Download Firefox Systems and Languages What's New Privacy Give Firefox a tune up Refresh Firefox How does it work? Download a fresh copy Customize settings and preferences Make Firefox yours through customization settings and add-ons ទាំងអស់ All articles and threads Import settings from other browsers Video, audio and interactive settings Display and appearance Manage add-ons In English Add-on Badges Firefox options, preferences and settings Does Firefox share my location with websites? Make Firefox your default browser Manage local site storage settings Connection settings in Firefox Global Privacy Control Personalized extension recommendations Automatically fill in credit card and payment method data on Web forms Firefox's performance settings Tips for assessing the safety of an extension Pop-up blocker settings, exceptions and troubleshooting How to set the home page Open Firefox automatically when you start your computer Back up and restore information in Firefox profiles Recommendations from Firefox Use the Firefox Sidebar to access bookmarks, history and synced tabs How to change your default browser to Firefox on Windows An extension changed my New Tab page or home page Restore previous session - Configure when Firefox shows your most recent tabs and windows How do I restore my tabs from last time? Change your default search settings in Firefox Add or remove a search engine in Firefox Change the program used to open email links View PDF files in Firefox or choose another viewer How do I use the Firefox spell checker? Use Firefox in another language Recovering important data from an old profile Control audio or video playback with your keyboard Block and unblock websites with parental controls on Firefox Search with the Firefox address bar Cannot remove an add-on (extension or theme) Customize your New Tab page to hide or display content Access hidden tabs in Firefox Manage extension shortcuts in Firefox Feed reader replacements for Firefox Choose display languages for multilingual web pages Importing Safari data into Firefox How to use collections on addons.mozilla.org Assign shortcuts to search engines Configuring Networks to Disable DNS over HTTPS End of support for Adobe Flash Share data with Mozilla to help improve Firefox Closing multiple Tabs - option to disable warning How to disable the built-in PDF viewer and use another viewer Disable high contrast mode in Firefox Firefox Notes status Mozilla Voice Server Proxy Retiring