Sorted by the bottleneck each one fixes, not by vendor, with a plain read on what permissions every tool wants and which ones to uninstall to keep Chrome fast.
The column most listicles leave out is Access, what each extension can actually see. "All sites" isn't automatically bad (a grammar checker genuinely needs it), but it's the permission that turns a compromised extension into a data leak, so it belongs in the comparison.
| Extension | Fixes | Free tier | Paid from | Access | Browsers |
|---|---|---|---|---|---|
| uBlock Origin Lite | Ads, trackers | Full (free) | — | All sites | Chrome, Edge |
| Grammarly | Writing | Generous | ~$12/mo | All sites | Chrome, Firefox, Edge |
| Todoist | Tasks | Good | ~$4/mo | On click | Chrome, Firefox |
| Notion Web Clipper | Research capture | Free | — | On click | Chrome, Firefox |
| Toby | Tab overload | Free core | ~$5/mo | All sites | Chrome, Firefox, Edge |
| OneTab | Tab overload, RAM | Full (free) | — | On click | Chrome, Firefox |
| Dark Reader | Eye strain | Full (free) | — | All sites | Chrome, Firefox, Safari |
| Bitwarden | Passwords | Full (free) | $10/yr | All sites | Chrome, Firefox, Safari, Edge |
| Toggl Track | Time awareness | Full (free) | ~$9/mo | On click | Chrome, Firefox |
| Clockify | Time + billing | Full (free) | ~$4/mo | On click | Chrome, Firefox |
| Loom | Async comms | 25 videos | ~$12/mo | All sites | Chrome, Edge |
| Text Blaze | Repetitive typing | Good | ~$3/mo | All sites | Chrome, Edge |
| Sider (AI sidebar) | AI assistance | Limited | ~$8/mo | All sites | Chrome, Edge |
| Unhook | YouTube distraction | Full (free) | — | YouTube only | Chrome, Firefox, Edge |
| SponsorBlock | YouTube sponsor skips | Full (free) | — | YouTube only | Chrome, Firefox, Edge |
This isn't a popularity dump. Each tool had to clear five tests: it solves a real, recurring bottleneck; its permissions are proportionate to its job; it works under Manifest V3 (the 2026 rules that broke some old extensions); it's still actively maintained; and its free tier delivers genuine value, not a five-minute trial. We weigh verifiable signals, install counts, Chrome Web Store ratings, publisher identity and permission scope, rather than inventing benchmark numbers. Where there's a real limitation, we name it.
Before adding tools that help you do more, remove what stops you. These reclaim the most attention for zero cost.
The original uBlock Origin was the gold standard, but Chrome's move to Manifest V3 changed the rules: the full version was pulled from the Chrome Web Store in late 2024, remaining Manifest V2 extensions were disabled in July 2025, and the last command-line workaround is being removed around Chrome 150 (mid-2026). On Chrome you now install uBlock Origin Lite, which works within the new rules. The verdict: still the best free blocker on Chrome, but honestly weaker than the original, its blocklist is smaller and it can't do dynamic filtering. If blocking is critical to you, the full uBlock Origin still runs on Firefox and Brave.
A pair, not a single tool. Unhook hides the recommendation rail, the homepage feed, Shorts and other rabbit-hole surfaces, so you can watch the one video you came for and leave. SponsorBlock crowdsources sponsor-segment timestamps and skips them automatically. Both only request access to YouTube, which is exactly the narrow scope you want, a tool that touches one site shouldn't ask for all of them.
Still the most polished writing assistant, working across Gmail, Docs, LinkedIn and most text fields. The free tier covers the errors that actually embarrass you. Read the permission honestly, though: to check your writing everywhere, it reads what you type everywhere, so trust in the publisher matters more here than for most tools. Grammarly is an established company with enterprise deployments, which is the reassurance, but if your job involves confidential text, check your employer's policy first. Full Grammarly review.
Type a short shortcut like /addr and it expands into your full address, a canned email reply, or a templated message with fillable fields. For support reps, recruiters and salespeople it pays for itself in a week. Same permission caveat as Grammarly: text expanders work by watching what you type on every site, so install it from the verified publisher and not a clone.
The extension adds the current page as a task in one click and shows your day from the toolbar. It only activates when you click it, so it costs almost nothing in memory and asks for almost nothing in permissions, a model more extensions should copy.
Clip a page, a simplified version of it, or just the link, straight into a Notion database. If you already live in Notion it removes the copy-paste step entirely. Like Todoist, it only runs when invoked. Full review.
Tabs are the quiet productivity killer, and they're also the quiet RAM killer (more on that below).
OneTab is the minimalist: one click converts all your open tabs into a single list, freeing the memory they were holding. It's free, light, and only acts when you tell it to. Toby is the organised cousin, saving tab groups into a visual dashboard you can name and reopen by project, at the cost of broader permissions and a paid tier for teams. Pick OneTab to simply stop the bleeding; pick Toby if you manage recurring sets of tabs.
One toolbar click starts a timer tagged to a project, and the weekly report is usually a wake-up call. Toggl Track has the cleaner interface; Clockify is the better pick if you also need invoicing and a free team plan. Both keep permissions minimal. Toggl review.
Record your screen and camera, get an instant shareable link. For async teams it removes whole meetings. The free cap is real but workable for occasional use. Full review.
The best free password manager, open source and independently audited. Autofills logins, generates strong passwords, syncs everywhere. The all-sites permission is inherent to autofill; Bitwarden's openness is what makes that access trustworthy. If you want the full comparison, see our best password manager extensions guide.
Adds a genuine, adjustable dark mode to every site, not just the ones that ship one. Open source and lightweight. Full review.
AI sidebars sit in a panel and act on whatever page you're viewing, summarise an article, rewrite a paragraph, answer a question. Sider and Monica bundle multiple models; Perplexity leans into sourced answers. They're useful, but they're also the highest-trust ask on this list: by design they can read everything you browse, and the category attracts impersonator clones. Install only the real publisher's version, and treat anything calling itself "ChatGPT for Chrome" with suspicion, see our AI writing extensions guide for the safe picks.
Honesty is the point of this site, so a few you can leave out:
Every active extension costs memory and a little load time on each page, and the cost isn't evenly spread. The expensive ones are those that inject a content script into every page you open, Grammarly, ad blockers, AI sidebars, text expanders. The cheap ones only wake up when you click them, Todoist, OneTab, Toggl, Notion Clipper. That's why the "Access" column doubles as a rough performance guide: "on click" is light, "all sites" is heavier.
chrome://extensions and remove anything you haven't used in two weeks; disable (don't just ignore) anything seasonal. Keep your active count under about 8. Two extensions that do the same job, two ad blockers, two AI sidebars, is the most common cause of a sluggish Chrome. If your browser already feels slow, our guide on extensions slowing Chrome walks through finding the culprit.The single most useful habit when installing any productivity extension: match the permission to the function. A task list that wants "read and change data on all websites" plus your browsing history is asking for far more than it needs. The dangerous combination is broad site access paired with cookie or history access, which is how a compromised extension turns into a credential or tracking leak, exactly the pattern behind the wave of malicious extensions flagged through 2026. Before you click "Add to Chrome", run the extension through our free Extension Safety Checker, and read the deeper 7 red flags guide if anything looks off.
Mostly, with caveats. Edge, Brave, Opera and Vivaldi are Chromium-based and install these extensions straight from the Chrome Web Store, so everything here works. Firefox runs its own add-on store but carries Firefox builds of the major tools, Grammarly, Bitwarden, Dark Reader, Todoist, and notably keeps the full uBlock Origin that Chrome dropped. Safari support is the patchiest: Bitwarden and Dark Reader have Safari versions, but many smaller tools don't, and Safari extensions install through the Mac App Store rather than a browser store. Whatever the browser, the safety logic is the same, judge the extension, not the badge.