Chrome is the default browser on almost every Android phone in the world. That is a fact of life, not a criticism — Chrome is genuinely fast, well-integrated with your Google account, and works everywhere. What makes Firefox for Android worth installing anyway is that it is now the only mainstream browser on the platform that does two specific things: it runs real extensions, and it is not built by a company whose main business is advertising.
What Firefox does well
Extensions. This is the single feature that separates Firefox from every other mobile browser worth using. On Firefox for Android, you can install actual desktop-class extensions — uBlock Origin (the best ad blocker in the world), Dark Reader (forces dark mode on every site), Bitwarden (see our review), Tampermonkey, LanguageTool, and more. None of the other mainstream browsers on Android do this. Chrome doesn’t. Edge doesn’t. Opera has a very limited set. Firefox alone.
Tracking protection. Firefox blocks known third-party trackers by default. On most sites, you notice it as fewer creepy ad-retargeting after your first visit and slightly faster page loads. The Enhanced Tracking Protection dashboard shows you what got blocked on each page — sometimes hundreds of trackers on a single news site.
Sync. A Firefox account syncs your bookmarks, history, tabs, saved passwords, and open tabs across desktop and mobile. If you use Firefox on a laptop, this is exactly the parity you get with Chrome + Google account, except with less data flowing to advertising infrastructure.
Reader View. One tap on the URL bar and cluttered articles become clean text. On phones with small screens or aggressive ad-heavy sites, this alone justifies the install.
What it does less well
Speed. On raw benchmarks and on the average website, Chrome is faster on Android. Firefox has narrowed the gap significantly in the last two years, but on complex web apps (Google Docs, Figma, heavy JavaScript sites) you may still notice Chrome winning. For everyday browsing — news, social, shopping, documentation — the difference is small enough that you stop noticing after a week.
Casting. Chrome’s Cast-to-Chromecast integration is smoother than Firefox’s. If you regularly send video from your phone to a TV, Chrome or the app’s own cast button is the better tool.
Certain enterprise logins. A small number of corporate SSO systems still assume Chrome and misbehave in Firefox. If your job depends on one of these, keep Chrome installed alongside.
Installing extensions on Firefox for Android
Open Firefox → menu → Add-ons → tap the plus icon next to an extension you want. The most-installed ones are worth trying first:
- uBlock Origin — best-in-class ad and tracker blocker. Makes ad-heavy news sites usable on mobile in a way Chrome cannot match.
- Bitwarden — password manager (see our Bitwarden review). Autofills logins directly in Firefox.
- Dark Reader — proper dark mode on every site, not the imperfect force-dark that Chrome offers.
- Tampermonkey — user scripts. Overkill for most people, essential for the few who use it.
These four alone justify moving to Firefox for a week to see how you feel about the change.
Battery, memory, and data
Firefox’s memory footprint on a modern phone is comparable to Chrome. Older phones (3 GB RAM or less) may see Firefox pushed out of memory when you switch apps and reopen tabs from scratch — this is annoying but not unique to Firefox.
Battery use with tracker blocking and ad blocking enabled is measurably better than Chrome without them, since fewer background scripts and network requests fire per page.
Who should install it
Install Firefox if you care about running an ad blocker on mobile, if you already use Firefox on a laptop, or if you want an alternative to a Google-controlled internet stack on your phone. Even keeping it as a secondary browser — Chrome for daily use, Firefox for reading news and long articles with uBlock Origin on — is a real quality-of-life improvement.
Skip it if you rely on Chrome-only enterprise apps, if you cast to TVs constantly, or if you have never wanted an ad blocker and do not want to think about privacy trade-offs at all.
Verdict
4.5 / 5. Not the fastest browser on Android. The most flexible one, and the most respectful of you. For anyone who has ever felt Chrome doing a bit too much on their phone, Firefox is the answer that has quietly existed the whole time.