Protection is on by default
Enhanced Tracking Protection blocks known trackers automatically, while Total Cookie Protection keeps cookies separated by site to reduce cross-site tracking.
Find your way back to a better internet
Firefox is a free, open-source browser from Mozilla built around privacy by default, user choice and an independent browser engine. Enhanced Tracking Protection, Total Cookie Protection, extensions, tab tools, Sync and optional AI controls let you shape the browser around how you work.
Site privacy policy
Keep your attention on the page
Reader View, tab groups, pinned tabs and Picture-in-Picture help you stay oriented when you are reading, researching or multitasking.
Make the browser work your way
Choose themes, extensions, tab layouts, sidebar tools and whether AI features appear at all. Firefox keeps those decisions in your hands.
Built on Gecko, not Chromium
Firefox uses Mozilla’s Gecko browser engine, giving the open web a major browser engine that is independent of the Chromium codebase.
Switch browsers without starting over
Firefox can import bookmarks, saved passwords, browsing history and other preferences from another browser, so you can move your everyday setup first and fine-tune privacy, tabs and extensions afterward.
Privacy without the setup work
Enhanced Tracking Protection blocks known trackers as you browse. Total Cookie Protection adds another layer by keeping cookies in separate site-level containers, making it harder for third parties to connect activity across websites.
Pick up your browsing on another device
Sync bookmarks, passwords, history and open tabs
Sign in with a Mozilla account to choose what Firefox Sync shares across your Firefox installations, including bookmarks, passwords, history, open tabs, add-ons and settings.
Privacy, control and focus are part of the core browser
A browser that helps you stay oriented
Reader View removes visual noise from articles, tab groups organize related work, pinned tabs keep important pages close, and Picture-in-Picture keeps video visible without taking over your workspace.
Tabs, extensions and interface choices are yours
- Use tab groups, Firefox View and vertical tabs to manage larger browsing sessions
- Open bookmarks, history, synced tabs and tools from a customizable sidebar
- Add Firefox extensions, themes and toolbar changes to build a browser around your workflow
AI is optional, not the center of the browser
Firefox lets you decide whether AI features appear and which services you want to use. If AI is not part of your workflow, you can keep it out of the way.
Compare Firefox by engine, privacy model and browser ecosystem
Different browsers make different choices about engines, tracking protection, extensions, accounts and built-in services. The comparison pages below break those tradeoffs down without reducing them to a single winner.
Firefox vs Chrome
Compare Gecko and Chromium/Blink, privacy defaults, extension platforms, account sync, tab tools and developer workflows.
Compare Firefox and ChromeFirefox vs Brave
Compare Gecko and Chromium, Enhanced Tracking Protection and Total Cookie Protection against Brave Shields, plus extensions, Sync, Rewards and Wallet.
Compare Firefox and BraveFirefox and the Google ecosystem
See how Firefox works with Google Search, Gmail, YouTube, Drive and Docs, and where Mozilla accounts differ from Google accounts.
Explore Firefox and GoogleFirefox vs DuckDuckGo
Compare tracking protection, cookie defenses, extensions, Sync & Backup, Fire Button, Email Protection and other built-in privacy tools.
Compare Firefox and DuckDuckGoFirefox features for privacy, organization and everyday browsing
Built-in PDF editor
Fill forms, add text, annotate PDFs and save your changes directly in Firefox.
Protections Dashboard
See which trackers Firefox has blocked and review the privacy protections working in the background.
Browser sidebar
Keep bookmarks, history, synced tabs, vertical tabs and optional tools beside the page you are viewing.
Optional AI tools
Use supported AI services from the sidebar when they are useful, or hide AI entry points when they are not.
Vertical tabs
Move open pages into a side list so longer titles and larger tab collections are easier to scan.
Total Cookie Protection
Keep cookies separated by site so third parties cannot reuse the same cookie to follow you across the web.
Tab groups
Group related pages by project or topic, then collapse groups you do not need in the moment.
Firefox extensions
Add productivity, privacy, development and content tools through the Firefox Add-ons ecosystem.
Customize Firefox
Change themes, toolbar controls, tab layouts and sidebar settings to match the way you browse.
Private Browsing
Close a private window to clear that session’s browsing and search history along with its cookies.
Bookmark manager
Organize important pages with folders and tags, then keep them available through Firefox Sync.
Password manager
Save and autofill logins in Firefox, with optional Sync across your signed-in Firefox installations.
What real users say about Firefox
Useful browser reviews are specific: people talk about extensions, Sync, responsiveness, tab-heavy workflows and site compatibility. These summaries reflect public user discussions rather than invented testimonials.
Google Play reviewerVerified review · Aug 26, 2026
A Firefox Android reviewer highlighted full uBlock Origin support and the wider extension model as major reasons to use Firefox, while also noting that Android smoothness and memory management can lag Chromium-based browsers on some phones.
Source: Google Play · Firefox for Android
r/firefox userReddit · May 7, 2026
A user moving from Brave said Firefox felt more responsive in their everyday browsing and liked using it with uBlock Origin. Replies in the same thread showed the tradeoff clearly: other users still found some heavy JavaScript sites faster in Chromium browsers.
Source: Reddit · r/firefox
r/firefox userReddit · Mar 8, 2025
One long-time Chrome user described the switch as easier than expected after importing browser data and installing Firefox extensions. The discussion centered on extension flexibility rather than benchmark scores.
Source: Reddit · r/firefox
r/firefox userReddit · May 28, 2025
A returning Firefox user said everyday browsing felt snappy despite benchmark expectations. Other commenters reported the opposite on their own hardware, reinforcing that browser performance depends heavily on sites, devices, extensions and profiles.
Source: Reddit · r/firefox
r/firefox userReddit · Jun 11, 2026
A long-time user reported a recent slowdown on media-heavy sites even after troubleshooting. The thread is a useful counterpoint to performance praise: Firefox can feel different across hardware, workloads and site behavior.
Source: Reddit · r/firefox
r/browsers userReddit · Mar 15, 2026
After two years on Brave, one user preferred Firefox for its cleaner feel, extension support and deeper customization. They still described Brave as a solid browser, making the comparison about workflow preference rather than a universal winner.
Source: Reddit · r/browsers
Firefox browser FAQs
These answers cover Firefox’s browser identity, privacy defaults, switching, Sync, extensions and browser engine. Platform requirements, editions and installers belong on the download page.
What makes Firefox different from Chromium-based browsers?+
Firefox uses Mozilla’s Gecko browser engine rather than Chromium/Blink. It also centers privacy defaults, user control, extensions and an independent browser engine as part of its product identity.
Does Firefox block trackers by default?+
Yes. Enhanced Tracking Protection is built into Firefox and blocks known trackers automatically. Total Cookie Protection is also enabled by default and keeps cookies separated by site to reduce cross-site tracking.
Can I switch from Chrome, Edge or another browser without starting over?+
Yes. Firefox can import bookmarks, saved passwords, browsing history and other preferences from supported browsers, so you can move your core browsing setup before fine-tuning Firefox.
What can Firefox Sync keep in sync?+
With a Mozilla account, Firefox Sync can synchronize bookmarks, passwords, open tabs, browsing history, add-ons, settings and other selected data. You can choose which categories you want to sync.
Does Firefox support browser extensions?+
Yes. Firefox has its own Firefox Add-ons ecosystem and supports WebExtensions. Extensions can add privacy, productivity, development, tab-management and content tools to the browser.
Is Firefox based on Chromium?+
No. Firefox uses Mozilla’s Gecko engine rather than Chromium/Blink. That makes it one of the major browsers maintaining an independent web engine implementation.
Want a browser with privacy and choice built in?
Firefox combines built-in tracking protection, flexible tabs, extensions, customization and Sync without making AI or a single service ecosystem the center of the browser.