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Add-ons are like apps that you install to add bells & whistles to Firefox. You can get add-ons that compare prices, check the weather, change the look of Firefox, listen to music, or even update your Facebook profile. This article covers the different types of add-ons available and how to find and install them.

Add-ons are like apps that you install to add bells & whistles to Firefox. You can get add-ons that compare prices, check the weather, change the look of Firefox, listen to music, or even update your Facebook profile. This article covers the different types of add-ons available and how to find and install them. __TOC__ = What types of add-ons can I install? = There are three general types of add-ons: * [[Using extensions with Firefox|Extensions]]<br/> Extensions add new features to Firefox, or modify existing ones. There are extensions that allow you to block advertisements, download videos from websites, integrate Firefox with websites like Facebook or Twitter, and add features you see in other browsers. * [[Using themes with Firefox|{for not fx35}Appearance{/for}{for fx35}Themes{/for}]] <br/> There are two types of appearance add-ons — [[Using themes with Firefox|themes]], which changes the look of buttons and menus and [[Personas]], which decorate the menu bar and tab strip with a background image. * [[Using plugins with Firefox|Plugins]] <br/> Plugins let you add the ability for Firefox to play all kinds of Internet content. These usually include patented formats like Flash, Quicktime and Silverlight that are used for video, audio, online games, presentations, and more. Plugins are created and distributed by other companies. To view which add-ons you have installed: # {for not fx35}{for win}At the top of the Firefox window, click on the {button Firefox} button ({menu Tools} menu in Windows XP), and then click {menu Add-ons}{/for}{for mac}On the menu bar, click on the {menu Tools} menu, and then click {menu Add-ons}{/for}{for linux}At the top of the Firefox window, click on the {menu Tools} menu, and then click {menu Add-ons}{/for}. The Add-ons Manager tab will open{/for}{for fx35}{for win}At the top of the Firefox window, click on the {menu Tools} menu, and select {menu Add-ons}{/for}{for mac}On the menu bar, click on the {menu Tools} menu, and select {menu Add-ons}{/for}{for linux}At the top of the Firefox window, click on the {menu Tools} menu, and select {menu Add-ons}{/for}. The Add-ons window will open{/for}. # Select the {menu Extensions}, {menu {for not fx35}Appearance{/for}{for fx35}Themes{/for}} or {menu Plugins} panels. = How do I find and install add-ons? = Here is an overview to get you started: # [[T:Open Add-ons|type=Get Add-ons]] # {for not fx35}To see more information on the Featured Add-ons or Personas, just click on one of them. You can then click the green {button Add to Firefox} button to install it.{/for}{for fx35}To install a recommended add-on, just click the {button Add to Firefox...} button. {/for} #*You can also search for specific add-ons by using the search box at the top. You can then install any add-ons you find with the {for not fx35}{button Install}{/for}{for fx35}{button Add to Firefox...}{/for} button.{for win,fx4}[[Image:Add-ons Win1]]{/for}{for mac,fx4}[[Image:Add-ons Mac1]]{/for}{for linux,fx4}[[Image:Add-ons Lin1]]{/for}{for win,fx4}[[Image:Add-ons Win2]]{/for}{for mac,fx4}[[Image:Add-ons Mac2]]{/for}{for linux,fx4}[[Image:Add-ons Lin2]]{/for} #Firefox will then download the requested add-on and may ask you to confirm that you want to install it. # Click the {button Restart Now} button that may pop up. Your tabs will be saved and restored after the restart. {for not fx35} After having installed some extensions, you can get an icon of the extension in the Add-on bar depending on how the developer made it available. For more information, see [[What is the Add-on Bar?]]. {/for} If you want to uninstall an add-on, see [[Uninstalling add-ons]]. = Troubleshooting add-ons = For information on troubleshooting problems with extensions, plugins, or themes, see the articles below. == Problems with installing or uninstalling add-ons == * [[Unable to install add-ons]] * [[Unexpected installation error -203 when installing add-ons]] * [[Cannot uninstall an add-on]] {for fx35} * [[Personas disappear from the Add-ons window]] {/for} == Disabled or blocklisted add-ons == * [[Add-ons are disabled after updating Firefox]] * [[Add-ons Blocklist]] == Problems caused by add-ons == * [[Troubleshooting extensions and themes]] * [[Troubleshooting plugins]] * [[Websites or add-ons incorrectly report incompatible browser]]