Firefox 3.5 has been around for quite a while, yet you can still find add-ons and themes that were not updated to work with it (most of them abandoned). Some of them are great, providing unique functionality that you can’t otherwise get.
So, if you are already using Firefox 3.5 (which is faster and better in a lot of ways), is there something you can do about those plugins?
Why, yes, yes there is!
Firefox developers have built in a setting that you can change to allow installation of older add-ons and themes. It is disabled by default, as some of those plugins are incompatible with the new version and can cause crashes, freezes and other problems.
But most of them will still work, and the only way to find out is to try it yourself.
» Continue reading How to Install Old Add-ons in Firefox 3.5