I felt like Firefox hasn’t been quite snappy enough lately, and I heard that Firefox 3 is mostly performance updates, so I decided to give the Beta a try. ( get Firefox 3 Beta 1 here ).
Although it was much faster, I could not live without my extensions, so I went back down to version 2. Today, after a little searching, however, I found out how to force my extensions to work in the Beta.
What you can do is open the configuration ( about:config ) in your Firefox browser, right click the list and create a boolean extensions.checkCompatibility option there. Set its value to false and restart the browser.
Awesome! Firefox 3 is SO fast!