Firefox is a free, open-source web browser developed by Mozilla, a non-profit organization committed to privacy, transparency, and an open web. Unlike Chrome, Edge, and Safari—browsers controlled by large corporations—Firefox stands alone as the only major browser built to serve users first, not advertisers. What makes Firefox particularly valuable is its privacy-first architecture: features like Enhanced Tracking Protection, Multi-Account Containers, Total Cookie Protection, and a free built-in VPN are built directly into the browser, not bolted on later. Keep in mind that many of Firefox's most powerful capabilities—like about:config tweaks, container isolation, and the experimental Firefox Labs features—require intentional setup, but that's exactly what gives you true control over your browsing experience.
What This Cheat Sheet Covers
This topic spans 24 focused tables and 229 indexed concepts. Below is a complete table-by-table outline of this topic, spanning foundational concepts through advanced details.
Table 1: Navigation Shortcuts
These are the keystrokes you'll reach for constantly—opening and closing tabs, hopping between windows, and reloading pages. Master a handful of them, like Ctrl+Shift+T to resurrect a tab you closed by mistake or Ctrl+L to jump straight to the address bar, and you'll rarely touch the mouse again.
| Shortcut | Example | Description |
|---|---|---|
Ctrl+T | Opens a new tab in the current window. | |
Ctrl+W | Closes the current tab. | |
Ctrl+Shift+T | • Reopens the most recently closed tab • press repeatedly to restore multiple tabs in reverse order of closure. | |
Ctrl+L | Focuses the address bar and selects all text for quick typing or copying. | |
F5 | Reloads the current page from cache. | |
Ctrl+Shift+R | Hard refresh: reloads bypassing cache to fetch fresh content from server. | |
Alt+← | Navigates back/forward in browsing history for the current tab. | |
Ctrl+Tab | Cycles forward through open tabs in most-recently-used order. |