Updating firefox linux
To allow it to use all your replacement-rules, change when you will be trying to open content dedicated to that plugin on the web.
You may have to change the order of preferred language for displaying pages in to make the spell check default to the language of the addon dictionary.
Install the in the Firefox address bar or go to the Add-ons entry in the Firefox Menu and select the Plugins tab. To examine them, enter in the Firefox address bar: .
For a useful starting point, see e.g custom which is targeted at privacy/security conscious users.
Firefox is well known for its large library of add-ons which can be used to add new features or modify the behavior of existing features.
Firefox's "Add-ons Manager" is used to manage installed add-ons or find new ones.