Installing your own extensions in Firefox 3 beta 5

I’m sure that many of you noticed that in the new Firefox beta 5, there is no ‘Install’ button in the addons dialog. Although presumably for security reasons, it is really useful to have if you, say, manually change extensions to make them compatible…

Here is how to re-enable that button:

1. Open ‘about:config’
2. Find the key named extensions.hideInstallButton
3. Double click to change it to false

The install button will now show up in the ‘addons’ box.