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Many add-ons are automatically compatible with the latest Firefox. For those that aren't, we'll show you how to search for new versions or find an alternative.

{note}Note: Starting in Firefox 57, which will be released in November 2017, only extensions that adhere to the [https://developer.mozilla.org/Add-ons/WebExtensions new technology] will work in Firefox. See [[Firefox add-on technology is modernizing]].{/note} When you update Firefox, it automatically checks your add-ons and updates them to compatible versions when possible. If an add-on can't be updated and is no longer compatible, Firefox turns it off. This article shows you how to update those add-ons and get them working again. ;{for win}[[Image:Incompatible - Win]]{/for} {for fx43} {note}'''Note:''' If an add-on is disabled and displays a message, ''(Add-on name) could not be verified for use in Firefox'' see [[Add-on signing in Firefox]].{/note} {/for} __TOC__ = Check for new versions of your add-ons = Firefox checks for new versions of your add-ons once a day and updates them automatically. You can manually check for new versions at any time. #Click on the menu button [[Image:new fx menu]] to expand the menu panel. #Click {menu Add-ons}. The ''Add-ons Manager'' page will open. #Click [[Image:Add-on Tools Icon]] on the ''Add-ons Manager'' page and select {menu Check for Updates}. If Firefox finds updates, they will be downloaded automatically. #;[[Image:Extension Update Win 1]] #Click the "''Restart now to complete installation''" link if prompted. #;[[Image:Extension Update Win 2]] == Search for updates on the add-on's website == Some add-on makers have different versions of their add-on for different versions of Firefox so updating through the Add-on Manager doesn't work. In this case, an update might be available on the add-on's website. # In the Add-ons Manager tab, find the incompatible add-on on the list. Click on the '''More''' link to see more information about that add-on, and then click on the link next to ''Homepage''. You will be taken to the home page for that add-on. # Download the latest version of the add-on from the add-on home page. {note}'''Note:''' If there isn't a version of the add-on available that works, it might help to contact the makers of the add-on while you are on their website.{/note} = Search for alternatives = There may be other add-ons with similar features that are compatible with your version of Firefox. The [https://addons.mozilla.org Add-ons site] is a good place to find alternatives.