Go Full Screen. To display any page you’re browsing in full screen mode, hit F11. Hitting F11 again will return it to normal size.

Increase and Decrease Text Size. You can instantly decrease the size of text on a Firefox page by hitting Ctrl+hyphen, which is useful for getting more of an aerial view than usual. Crtl+Plus will increase the size of the text again.

Save Pages as Files. To save any web page you’re looking at as a file, hit Ctrl+S.

Start New Tabs. Many people use Firefox’s tabbed browsing very haphazardly. To open a new Tab, hit Ctrl+T. Then enter in whatever URL you want for that tab. You can use Ctrl+Tab to switch between tabs.

Build Your Bookmarks. Hit Ctrl+D and click OK to add any page you’re viewing as a bookmark.

View Your History. Hit Ctrl+H to view your browsing history at the side of your screen.

Quickly Get to Downloaded Files. Hit Ctrl+J to pull up Firefox’s Download Manager. Within Download Manager, you can click on the folder for your downloads to see them.