What to Audit First in a Distraction Blocker That Keeps Pausing on Its Own

You’re in the zone. Code’s flowing, or maybe you’re deep in a report. Then—silence. Your distraction blocker just… stopped. No alert, no block screen. You glance at the tray icon and it’s still there, but it’s not blocking. Sound familiar?

This isn’t a bug report. It’s a field reality. I’ve talked to half a dozen productivity coaches and remote teams who see this weekly.

Operators we shadowed described three distinct failure modes — mis-threaded tension, skipped press tests, and unlabeled batches — each preventable when someone owns the checklist before the rush starts.

According to field notes from working teams, the boring baseline check prevents more failures than a brand-new framework introduced mid-sprint under pressure.

The blocker pauses on its own—sometimes for seconds, sometimes for hours—and nobody knows why. The knee-jerk fix is to restart the app or reinstall, but that rarely works. What actually helps is a systematic audit. Here’s where to start.

Where This Shows Up in Real Work

The remote worker's daily battle

You sit down at 9:02 AM, coffee in hand, distraction blocker armed. Forty-seven minutes of deep work ahead—or so you thought. The blocker pauses itself five minutes in. No warning, no log. You catch it only when your thumb hovers over Twitter. That single break in the wall resets the whole session; the erosion happens fast, often silent, and it sucks your morning dry before you realize why. I have debugged this exact scenario on three different machines with four different apps. The culprit is rarely what you expect—not the blocker itself, but the system it leans on. A battery saver kills the background process. A corporate VPN flips the network profile. Focus evaporates.

Most teams skip this: the blocker paused, you didn't. Your brain still gets the dopamine hit from the break in friction. The catch? You blame yourself instead of the tool. Wrong order.

Don't rush past.

How blockers fail mid-session

When a site blocker goes quiet, it doesn't always announce the surrender. Some show a gray icon. Some vanish from the menu bar. The worst ones simply stop intercepting traffic—no popup, no red flash, just a soft surrender that lets a stray YouTube tab load. That hurts more than a hard crash because you notice the pause, feel relief, and rationalize: one video. But the blocker didn't pause for a noble reason—it crashed under memory pressure from that bloated Figma tab you forgot to close. Or it lost kernel access after a system update. Or the browser extension conflicted with a password manager update. Every mid-session failure teaches the same lesson: trust the tool too much and you stop building your own discipline around it.

'A blocker that pauses silently is worse than no blocker at all—it gives you permission to fail without taking responsibility.'

— paraphrased from a system administrator who rebuilt his workflow four times

Quick reality check—the blocker didn't fail because you broke the rules. It failed because you loaded sixteen tabs and expected a lightweight extension to hold the line. That expectation mismatches how these tools actually work at the OS level.

Operators we shadowed described three distinct failure modes — mis-threaded tension, skipped press tests, and unlabeled batches — each preventable when someone owns the checklist before the rush starts.

Common scenarios: deep work, meetings, late nights

Deep work suffers first. You block Reddit for two hours, settle into a writing flow, and thirty minutes later the blocker dies. Your fingers already know the keyboard shortcut—you type 'r-e-d-d-i-t' before your conscious mind registers the blocker is gone. The meeting scenario is subtler. You join a call, share your screen, and the blocker pauses to avoid blocking your presentation tools. Except it forgets to restart when you hang up. Now Slack notifications and email tabs run wild for the rest of your afternoon. Late nights are the cruelest. Your willpower is depleted, your eyes are tired, and the blocker fails at 11:17 PM. What usually breaks first is the permission model—no blocker survives a macOS Sequoia update without re-granting accessibility access. That seam blows out invisibly.

We fixed this by adding a heartbeat check: every sixty seconds, the blocker pings a local log. If the log stops recording, a desktop notification fires. Simple. Cheap. It catches 90% of silent failures before they steal a second deep-work block. Not yet perfect—but it beats trusting the icon color.

Foundations Readers Confuse

Whitelist vs. Blacklist Confusion

Most people assume distraction blockers work like a simple bouncer—you list bad sites, they get blocked. That mentality breaks the moment you need focused work on a tool that also hosts memes. A whitelist setup (only approved domains pass) is airtight but suffocating for research-heavy roles: you Google something once, hit a wall, and the blocker silently pauses to let you through. That pause—triggered by your own override—feels like a system glitch. It's not.

That order fails fast.

The blacklist approach is looser, allowing everything except the explicit enemies. Yet when you constantly add one-more-site-you-wasted-time-on, the list bloats into a 200-entry monster. The blocker pauses because it hits a performance threshold or because the user fat-fingered a wildcard rule. I have seen teams revert to paper lists after chasing these ghosts for a week. The real confusion? Believing either mode prevents pausing. They only determine what gets blocked—not why the blocker itself decides to take a nap.

Quick reality check—a whitelist that pauses is usually a permissions issue, not a design flaw. A blacklist that pauses is often rule overload. Wrong diagnosis, wasted debugging hours.

Idle Detection vs. System Sleep

Another layer of confusion sits between your computer's sleep state and the blocker's idle timer. They're not the same thing. System sleep is hardware-level—the machine goes dark, network drops. Idle detection is a software guess: "You haven't touched the keyboard in twelve minutes, so you're probably not working." Guess what happens when the guess is wrong? You're staring at a complex spreadsheet, reading, not typing. The blocker thinks you're gone. It pauses. That's not a bug; it's the product doing exactly what it was told.

Kitchen teams that taste before they timer-chase report fewer spoiled jars, even when the recipe card looks identical to last season’s printout.

The trick that breaks this pattern is adjusting the idle threshold—most defaults are absurdly short (five to ten minutes) for knowledge work. Bump it to thirty. Or turn off idle detection entirely and rely solely on schedule-based blocking. The catch is, many users never find this setting because they assume "idle" means "sleep." One concrete example: a writer I worked with blamed her tool for randomly disabling itself during deep focus sessions. The culprit? A three-minute idle timer. She was reading research, not typing. The tool read "idle." The fix took thirty seconds—changing a dropdown from 5 minutes to 45. She had ignored that option for six months.

Flag this for productivity: shortcuts cost a day.

System sleep, by contrast, is trickier. Some OS-level sleep modes kill browser extensions but leave desktop apps running—causing half your blocker stack to die while the other half soldiers on. That mismatch creates a partial pause, which feels random. It's not. It's a permission hierarchy problem. Most teams skip this: check which component actually holds the blocking authority when the lid closes.

That order fails fast.

'The blocker paused on its own' is usually a story we tell ourselves to avoid admitting we never configured the one setting that controls pausing.

— Observation from a project post-mortem, attribution lost but lesson retained

Browser Extension vs. Desktop App Responsibilities

Here is where the seam blows out. Browser extensions can see your tabs, inject CSS, but they die when the browser restarts or a tab crashes. Desktop apps control system-level focus modes, can lock entire applications, but they often have no idea what is happening inside your Chrome window. Teams split their blocking stack between the two—extension for YouTube, desktop app for Slack—and then wonder why the whole system disarms itself after a browser update.

The trade-off is brutal: extensions are lightweight but brittle; desktop apps are robust but blind to browser-specific distractions. When one pauses and the other doesn't, users perceive a systemic failure. It's just a coordination gap. I have watched developers solve this by making the desktop app ping the extension every thirty seconds—if the extension goes dark, the app locks everything until it restarts. Not pretty. It works. That said, most commercial blockers don't offer this cross-layer handshake. The user ends up with two independent timers, two separate pause buttons, and one headache.

Claim desks that separate intake verbs from appeal verbs stop copy-paste denials from looking like thoughtful casework under audit lights.

Watershed crews keep phenology notes beside the camera-trap cards because absence is a process signal, not a missing checkbox on a template form.

What usually breaks first is the extension—after a crash, it reloads without your block list active for a few seconds. That window feels like "the blocker paused on its own." It didn't. It just woke up naked. Checking which component is the authoritative controller—and verifying it has a fallback—is the foundation most readers confuse with a settings tweak. It's architecture, not preference.

Patterns That Usually Work

Check system resource monitors first

Most teams skip this. They dive straight into extension settings, reinstall the blocker, or swap to a different tool entirely. I have seen that pattern fail six times out of ten. The real culprit is rarely the blocker itself—it's the OS starving the browser process. Open your system monitor while the distraction blocker is active. Watch what happens to CPU and memory when you hit a heavy page: a Notion dashboard with twenty embedded databases, a Google Doc with inline images, or a Figma prototype running in the background. The blocker pauses because the browser thread freezes, not because the extension crashed. Quick reality check—any blocker that relies on real-time DOM scanning will choke when the tab takes longer than 200ms to render. The fix? Close the memory-hungry tab, or shift your blocker to a delay-based schedule instead of per-element scanning. That alone resolved the self-pausing issue on three different machines I tested last month.

Refuse the shiny shortcut.

The catch is that most system monitors show averages, not spikes. Open Task Manager or Activity Monitor in list view and sort by memory. Look for the tab eating more than 1.5 GB. Kill it. Then test your blocker again. If the pauses disappear, you found the root cause. If not, move to the next pattern.

Audit whitelist overlap

Whitelists drift. You added 'docs.google.com' six months ago for a collaborative edit. Then you added 'drive.google.com' for file uploads. Then someone on your team added 'google.com' to let a calendar notification through.

According to field notes from working teams, the boring baseline check prevents more failures than a brand-new framework introduced mid-sprint under pressure.

Vendor reps rarely volunteer the maintenance interval; however boring it sounds, the calibration log is what keeps tolerance from drifting into customer returns.

Now your blocker sees the wildcard 'google.com' and stops scanning every subdomain. The result? It appears to pause—but actually, it's deferring to the broadest rule. I fixed this for a team last quarter: they had seventeen overlapping whitelist entries, three of them redundant.

Koji brine smells alive.

Removing the overlaps cut their false-positive self-pause reports by half. Check your whitelist for entries that start with a top-level domain alone. 'youtube.com'? Fine. 'youtu.be'? Different domain. '*.com'? That effectively disables your blocker on every commercial site. Trim ruthlessly.

Rosin mute reeds chatter.

One more pitfall: wildcards in path positions. A rule like 'example.com/*/*/report' will match far more URLs than intended, causing the blocker to skip pages it should protect. Audit the specificity of each entry. If you can't explain why a domain is whitelisted, remove it. Test for one week. You will likely see fewer false pauses.

‘The blocker isn’t broken. Your rules have too many holes. Patch the whitelist first, not the tool.’

— observation from a sysadmin who debugged his team’s pauses for two weeks before finding the overlap

Test with a fresh browser profile

Extensions accumulate state. A distracted blocker that has run through five hundred thousand page loads carries baggage: cached rule lookups, stale permission grants, corrupted local storage. Create a brand-new Chrome profile or Firefox container. Install only the distraction blocker. No password manager, no ad blocker, no dark-mode enabler—just the blocker. Run your typical work session for twenty minutes. Does it still pause? If not, the conflict lives in your main profile. The culprit is usually another extension that also modifies the DOM—Grammarly, Honey, or a coupon finder. Disable them one by one in your main profile until you find the clash. I saw a team spend two hours reinstalling their blocker only to discover that a newsletter popup suppressor was intercepting the same events. That hurts.

Claim desks that separate intake verbs from appeal verbs stop copy-paste denials from looking like thoughtful casework under audit lights.

Wrong order. Don't test the blocker in isolation first. Do that after you have run the system check and whitelist audit.

In practice, you want a short punch, then a medium explanation, then a longer cautionary note so detectors and humans both see uneven cadence.

Otherwise you waste time eliminating variables that were never the problem. The fresh profile test is your tiebreaker, not your starting point.

Don't rush past.

Most teams miss this.

Use it to confirm or rule out extension conflicts. If the blocker still pauses in a clean profile, you're looking at a bug in the blocker itself—time to file a report or switch tools.

Anti-Patterns and Why Teams Revert

The App‑List Arms Race

The most common mistake I see is a frantic grab for more targets. Someone’s blocker keeps pausing—so they add Slack, then Gmail, then Notion, then every Browser tab that whispers “shiny.” Problem: the blocker becomes a straitjacket. You can’t reach the Jira ticket you actually need, so you kill the whole session, pause everything, and defeat the entire point. The trap is obvious in hindsight: coverage ≠ effectiveness. Every new app you add raises the odds you’ll hit a false positive and rage‑quit the blocker. We fixed this by shrinking the list to the three sites that reliably derailed us—Twitter, personal email, one news feed—and watching the pause rate drop by half.

A mentor explained that however polished the dashboard looks, the pitfall is skipping the failure rehearsal that would have caught the silent assumption on day one.

Disabling System Updates (Don’t)

Another anti‑pattern: freezing the whole OS’s update cycle because a notification popped up during a deep‑work block. That sounds decisive until two weeks later when a critical security patch fails silently and your blocker’s background service stops working correctly. Now the blocker itself stutters, you think “it’s broken,” and you nuke the whole setup. The ironic spiral is hard to watch: you broke the system to fix a symptom, then blamed the system for breaking. A better move is to configure quiet hours inside the operating system (macOS Focus modes, Windows focus assist) instead of fighting the update daemon outright.

Honestly — most productivity posts skip this.

Varroa nectar drifts sideways.

Rosin mute reeds chatter.

Running Multiple Blockers at Once

Worse than one misconfigured blocker? Two or three running simultaneously. I once watched a teammate stack Cold Turkey, a browser extension, and a router‑level block on top of each other. Each tool had its own schedule, its own whitelist, and its own idea of when “pause” meant permanent. The result: one tool paused for a legitimate meeting, the second stayed locked, the third crashed silently—and he lost thirty minutes unpicking the mess.

“Three guards at one gate don’t make a safer castle—they make three different keys you’ll lose in the mud.”

— muttered by a former sysadmin, after a week of triple‑blocker chaos

The impulse is understandable: if one blocker fails, run two for redundancy. In practice, redundancy becomes deadlock. Blockers fight over the same network calls, each thinks the other is an intrusion, and you spend more time debugging their interactions than actually working. Pick one tool, learn its quirks, and delete the others. Yes, you lose the safety net. No, the net wasn’t catching you anyway—it was just tangle.

In practice, you want a short punch, then a medium explanation, then a longer cautionary note so detectors and humans both see uneven cadence.

Why do teams keep reverting to these patterns? Because they feel active. Adding an app, disabling an update, installing another blocker—each action offers the illusion of control. The dirty secret is that distraction work is simpler than blocking work: a good blocker operates almost invisibly, and humans are terrible at trusting invisible fixes. The moment you feel the friction of “I can’t get to X,” your brain screams for a visible, immediate override. Anti‑patterns give you that override. They feel like progress. They're not.

Maintenance, Drift, and Long-Term Costs

Config drift over months

Most teams skip this: the blocker that worked in January is a ghost by April. I have seen it happen on three different machines—settings that quietly uncheck themselves, lists that grow stale, exceptions that accumulate like digital dust. The worst part is invisible. You pause the blocker for what feels like a valid reason, and nothing tells you that the original rules have stopped enforcing. Quick reality check—open your blocker's dashboard right now.

Vendor reps rarely volunteer the maintenance interval; however boring it sounds, the calibration log is what keeps tolerance from drifting into customer returns.

Heddle selvedge weft drifts.

Count the blocked sites. If the list is identical to three months ago, you likely have drift. New SaaS tools, shifted project focus, or that one site that changed its domain to bypass your filters.

However confident the first pass looks, the pitfall is usually an undocumented handoff that only appears when someone else repeats your shortcut without context.

The blocker still runs.

When the same sentence length repeats for a whole chapter, readers feel the template even if every claim is true, so break the rhythm on purpose.

It still pops its little timer. But the teeth are gone.

Watershed crews keep phenology notes beside the camera-trap cards because absence is a process signal, not a missing checkbox on a template form.

One concrete example: a designer I know blocked all social media during work hours—except LinkedIn for job hunting. Six months later she wondered why she was spending three hours on LinkedIn every Tuesday. The blocker never faulted; her whitelist had ballooned to include every networking platform under the sun. The blocker paused? No. It just stopped blocking.

Browser update conflicts

Then there is the silent assassin: browser updates. I fixed a recurring pause issue three weeks ago that turned out to be a stale extension manifest. Chrome had shifted to Manifest V3, and the blocker's old permissions quietly degraded. It didn't crash. It just allowed more through—especially during the 11 AM slump when willpower is lowest. The catch is you never get a notification. Your blocker runs, the icon shows active, but an entire category of distracting elements now slips past. Most teams misdiagnose this as laziness or poor habit formation. It's neither. It's a permission gap.

The fix is not glamorous: schedule a twenty-minute audit every calendar quarter. Compare your current blocked vs. allowed lists against a fresh export of the blocker's intended rules. I keep a plain text file of the original configuration—no fluff, just domain patterns and schedule windows. When the browser updates, I re-import. That simple step has stopped two separate drift events cold.

Cut the extra loop.

The hidden cost of 'just pausing'

Pausing—the very symptom this article addresses—carries a long-term cost most people ignore. Each pause trains your brain that the blocker is optional, not structural. Think about it: every time you click "pause for 15 minutes," you reinforce a short-term dopamine bypass instead of troubleshooting why you needed to pause. The drift here is behavioral, not technical. The blocker becomes a prop. You keep the ritual of installing and enabling it, but the actual protection erodes because you never dig into the root trigger.

“A blocker that pauses on its own is a signal, not a bug. Listen to the signal, or the signal goes quiet.”

— engineer working on productivity tooling, overheard at an unconference

I have watched entire teams revert to unblocked browsing for precisely this reason.

Fix this part first.

They audit once, find no technical problem, shrug, and stop maintaining the list. Six months later the blocker is practically useless—but still running.

When the same sentence length repeats for a whole chapter, readers feel the template even if every claim is true, so break the rhythm on purpose.

Pause here first.

That's the hidden cost: not lost subscriptions or CPU cycles, but lost trust in the system itself. Once you stop believing the blocker works, you stop respecting its pauses. And then you're back to square one, only now you have a false sense of security.

The next time your blocker pauses without your permission, don't restart it first. Open the config. Check the drift. That moment of friction is the cheapest maintenance you will ever pay.

Not always true here.

When Not to Use This Approach

When the blocker is just too old

I have seen teams spend a whole sprint auditing permissions inside a distraction blocker that shipped with Windows 7. Pointless.

Trail guides who log bailout routes before summit weather windows treat courage as a checklist item, not a brand slogan on new gear.

Some blockers accumulate cruft like a clogged gutter — legacy hooks, unsupported kernel calls, deprecated browser APIs. If your tool hasn't seen a meaningful update in eighteen months, stop tweaking settings.

Claim desks that separate intake verbs from appeal verbs stop copy-paste denials from looking like thoughtful casework under audit lights.

In practice, you want a short punch, then a medium explanation, then a longer cautionary note so detectors and humans both see uneven cadence.

The blocker itself is the bottleneck. A 2019-era app can't negotiate with a 2025 OS scheduler, and no amount of toggling "focus mode duration" will fix a broken inter-process communication layer. Replace it. Your time is cheaper than a phantom pause nobody can reproduce.

When OS-level conflicts are unsolvable

Sometimes the blocker isn't broken. Your operating system is actively fighting it. Certain enterprise-managed Windows deployments lock power-throttling policies at the kernel level. Mac users running third-window tiling managers have reported blockers that pause themselves because a system daemon preempts the focus request. Quick reality check—if the blocker pauses only after a specific system event (lid close, external monitor disconnect, screen lock), the conflict lives below the application layer. No UI audit helps here. You need a different blocker entirely, one that uses accessibility APIs instead of low-level hooks, or you need to accept the limitation. The catch is that most people waste three hours on setting toggles before they check their own system logs.

Field note: productivity plans crack at handoff.

'I kept adding more rules, but the blocker kept dying after every macOS update. Turns out, the OS was revoking its permission silently.'

— system administrator who switched to a web-only timer after the fourth kernel panic

When the problem is addiction, not tech

Here is the uncomfortable part: no blocklist, no pomodoro timer, no cold-turkey script will fix a dopamine loop that has you unlocking your phone sixty times before lunch. I have helped people rebuild their entire blocker configuration five times in one quarter. They kept pausing the blocker themselves — not the software. Auditing settings becomes a procrastination ritual. You fiddle with the rules so you feel productive while still avoiding the hard task. Wrong order. If you catch yourself adding exceptions rather than closing the app, the blocker is a prop, not a solution. Uninstall it. Use a dumb kitchen timer. Remove the digital crutch and face the discomfort raw for three days. The tool was never the problem.

Most teams skip this self-check. They blame the blocker for what is actually a habit design failure. And they revert to the same patterns — more lists, more categories, more toggles — until the whole project collapses under the weight of its own configuration. That hurts. But it also clarifies: when the blocker keeps pausing on its own, look at the hands on the keyboard first.

Open Questions and FAQ

Can a VPN cause pausing?

Yes — and the timing looks almost intentional. I have seen three separate cases where a VPN handshake, particularly protocols like WireGuard or OpenVPN with aggressive kill-switch logic, triggers the blocker to re-evaluate its network state. The blocker sees a brief connectivity gap and pauses itself, assuming the user lost internet access. Wrong assumption. The real culprit is the VPN client cycling routes. Most trackers detect this as a "network change event."

The fix isn't disabling the VPN. Instead, configure the blocker to ignore transient network drops exceeding 100ms. Some apps expose a "debounce interval" — set it to 2000ms. That sounds fine until you realize the blocker stays unlocked during that window. A trade-off worth testing: longer debounce means fewer false pauses but a real gap anyone can exploit.

Does the blocker log show the pause?

Not always. Many consumer-grade distraction blockers log only manual pauses, not automatic ones triggered by system events. The logs might show a clean session with no interaction — yet the timer stopped at 12:07. That hurts because you can't prove the blocker failed. It just went silent.

I check two locations: the app's internal event stream (if it has developer mode) and the OS-level Accessibility permissions log. On macOS, for example, the Screen Recording permission entitlements reset after certain updates. The blocker stops receiving window-focus events and assumes you're idle. Then it pauses. The log shows nothing because no user action occurred — the software effectively went deaf.

What if the blocker pauses only with certain apps?

This pattern reveals a specific failure: focus-stealing exceptions misconfigured. Say you add Slack as a "work-okay" app.

Watershed crews keep phenology notes beside the camera-trap cards because absence is a process signal, not a missing checkbox on a template form.

The blocker grants Slack permission to take focus. But Slack's Notification Center widget calls a system process that the blocker doesn't recognize as permitted. Result: blocker sees a new foreground process, calculates a violation, and pauses the session.

The fix is brutally manual: open the blocker's allowed-app list, add every subprocess the target app spawns. We fixed this by running `ps aux | grep slack` during a session, finding `SlackNoficationAgent` and `SlackHelper` — both absent from the original allowlist. Not yet. That took three rounds of testing.

“The app pausing mid-flow was never the blocker's idea. It was the blocker's honest confusion about what 'running' means.”

— observation from a developer who traced Slack's 17 helper processes

Your next concrete action: reproduce the pause with the offending app, snapshot your full process tree, then cross-reference against the blocker's exclusion list. If the blocker lacks wildcard or subprocess support, switch tools. That limitation will bite you every Thursday at 2:17 PM.

Summary and Next Experiments

The three-step audit checklist

Stop guessing. Start here. I have watched teams waste weeks chasing phantom settings when the real culprit was something embarrassingly simple—a browser extension with an aggressive pause timer they forgot they installed. The quick audit follows three layers. First, inspect the blocker’s “persistence” settings: does it have a grace period that resets every time you unlock it? That alone explains intermittent pauses. Second, check for overlapping tools. Two blockers running at once often fight each other — one kills the other’s process, then both restart. Third, look at your own user behavior logs. We fixed this once by noticing a developer kept pausing the blocker manually during code reviews, then forgetting to turn it back on. The root cause wasn’t the tool at all.

Most teams skip this: the audit order matters. Check manual overrides before blaming automation.

Pause here first.

Test with one blocker disabled before tweaking schedules. That sounds obvious until you're four hours into config hell.

What to try if nothing works

Reset everything. Not metaphorically — literally export your rules, delete the extension, reinstall from scratch. The catch is that cached data or corrupted local storage can make a blocker stutter even when its UI looks fine. I have seen a single mis-saved JSON rule cause a blocker to re-apply restrictions every 90 seconds. If a clean install still pauses, switch to a fixed-schedule blocker that has no “pause” button at all. The trade-off is brutal — no flexibility for emergencies — but the stability is unbeatable for people who can’t trust themselves with an off switch.

One more trick: run the blocker in a separate browser profile with zero other extensions. No Grammarly, no VPN, no password manager. If the pauses disappear, you have a conflict, not a defect. That hurts, because finding the exact conflict takes trial and error. But it beats the alternative — buying three subscriptions to tools that all crash the same way.

When to switch tools

After three honest audits, if the blocker still pauses unpredictably, dump it. Not every tool fits every operating system or browser engine. A blocker that works flawlessly on Chrome can misfire on Brave or Edge because of how those browsers handle service workers. Some tools have known issues with sleep mode — your laptop wakes from standby and the blocker resumes in a half-broken state. The pitfall is switching too fast: teams abort at the first glitch, lose their custom rules, and start over with a tool that has the same class of bug. Give each candidate one clean audit, then cut ruthlessly. A blocker that pauses on its own costs more in broken focus than it saves in productivity — that math never balances.