Uncover Firefox secret add-ons install button

Posted on December 24th, 2007 by Jason

Not all and available on the web are properly served by the server so they are easy to add. Sometimes they are offered as regular .XPI () or .JAR () files.

To install these, you need to either drag the file to the Manager (Tools menu, ) or select File/Open File… and browse for the file.

There’s yet another easier and more logical way: unhide a secret button in the Manager that will let you browser for extension or theme files stored in your computer:

* Enter about:config in the location bar to access the advanced preferences

* Look for preference .hideInstallButton

* Double click it to change it to false

Now you have a Install… button in the Manager you can use to install local or .

Note that the majority of and are available from Mozilla Add-ons where undergo a review process before made available and updates are served through a secure connection. Also, since it is already whitelisted you don’t need to grant further access to other web sites. Remember to always check if the add-on you are trying to install is not already available there.

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3 Responses to “Uncover Firefox secret add-ons install button”

  1. MS Windows Articles, Reviews and Videos on 24 Dec 2007 at 8:26 pm #

    (Tools menu, Add-ons) or select File/Open File… and browse for the file. There’s yet another easier and more logical way: unhide a secret button in the Add-ons Manager that will let you browser for extension or theme files stored in your computer:(more…)

  2. StumbleUpon - Your page is now on StumbleUpon! on 24 Dec 2007 at 10:52 pm #

    [...] Your page is on StumbleUpon [...]

  3. Tim on 25 Dec 2007 at 2:19 pm #

    Nice tip. Thanks!

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