Why browser extensions beat willpower
Most distraction happens inside one app: the browser. A tab is always one keystroke away, and the average knowledge worker switches context far more often than they think. A focus extension works because it puts a decision before the distraction instead of after it — the block, the timer or the friction fires while your intention is still fresh.
This guide compares the five extensions that actually hold up in 2026, based on how they handle four things that matter: blocking strength, work-break structure, analytics, and privacy.
Quick comparison
| Extension | Timers | Website blocking | Analytics | Privacy | Price |
|---|---|---|---|---|---|
| NGUMU | Pomodoro, 52-17, 90-20, 20-20-20, custom | Blacklist, whitelist, curated presets | Session logs, daily/weekly goals, streaks | Local storage, no personal data | Free, optional Pro |
| StayFocusd | Basic daily budget | Allowed/blocked sites | Minimal | Local | Free |
| Freedom | Scheduled sessions | Cross-device blocklists | Basic session history | Account required | Paid |
| Cold Turkey | Scheduled blocks | Very hard to bypass | Basic | Local, desktop app | Free + paid |
| One Sec | None | Breathing delay before a site opens | Attempt counts | Account optional | Freemium |
1. NGUMU: Screen Time Control — best all-rounder
NGUMU combines the two halves of focus work most tools split apart: a structured work-break timer and intelligent website blocking that only applies while a focus session is running. It ships with Pomodoro, 52-17, 90-20 and 20-20-20 presets plus fully custom cycles, so you can match the rhythm of the task rather than forcing every task into 25 minutes.
What makes it stick day to day:
- Full-screen break overlays that make it awkward to skip a break, which is exactly the point.
- A pre-break "blink warning" overlay that reminds you to rest your eyes before the break starts.
- Tab management during focus sessions, so multitasking has fewer places to hide.
- Session analytics — focus minutes, session counts, daily and weekly goal progress, and long-term trends in a popup dashboard.
- Multi-language UI and dark mode, and everything stored locally with no personal data collected.
Best for: anyone who wants blocking and rhythm without stitching together three tools.
Add NGUMU to your browser — free
2. StayFocusd — best minimal time budget
StayFocusd gives each distracting site a daily allowance. When the budget is gone, it's gone. It's excellent if your problem is "ten minutes of X becomes ninety" and you don't want any ceremony. It has no work-break cycles and almost no analytics, so it pairs better with a separate timer. See the full head-to-head in NGUMU vs StayFocusd.
3. Freedom — best for multi-device blocking
Freedom blocks across desktop and mobile from one schedule, which is the right answer if your phone is the real problem. It requires an account and a subscription, and its browser-side features are thinner than a dedicated extension.
4. Cold Turkey — strongest lockdown
Cold Turkey is the tool to pick when you genuinely cannot be trusted with an "unblock" button. Blocks are deliberately painful to remove. The trade-off is rigidity: it's a commitment device, not a daily rhythm tool.
5. One Sec — best for reflex scrolling
One Sec inserts a breathing pause before a distracting site loads and asks whether you still want to continue. Surprisingly effective against reflex opens, but it does nothing for planning, timing or measuring your work.
How to choose in 60 seconds
- You lose whole afternoons to reflex tabs → NGUMU or One Sec.
- You need work-break structure and eye rest → NGUMU.
- Your phone is the leak → Freedom.
- You bypass your own blocks → Cold Turkey.
- You just want a daily cap → StayFocusd.
If you want one extension that covers timing, blocking, breaks and measurement, start with NGUMU and only add another tool if a specific gap remains.
Frequently asked questions
Do focus extensions slow the browser down?
Well-built ones don't. NGUMU is event-driven and keeps its work in the popup and a lightweight background worker, so idle cost is negligible.
Can I use these on Microsoft Edge or Brave?
Yes. NGUMU is available for Google Chrome, Microsoft Edge and Brave. Edge and Brave both install Chromium extensions, so the experience is identical.
Are focus extensions private?
It varies. NGUMU keeps session data in local browser storage and collects no personal information. Tools that sync across devices necessarily send data to a server.
What's the best cycle length?
Start at Pomodoro (25/5). If you routinely find yourself interrupted mid-flow, move to 52-17 or 90-20. NGUMU lets you change this per session.