Firefox 3RC1 is just around the corner. Surprisingly, more than a few of the current Top 100 add-ons on AMO are not updated to work in Firefox 3. I say “current” because when Firefox 3 ships, those old add-ons will no longer be in the Top 100. Alex Polvi has a chart (updated daily) showing the status of Top 95% of AMO add-ons (by usage). You can see that many of the Top 100 have been updated to at least Firefox 3.0b3 or greater.
Many of the non-updated add-ons are themes. Themes are hard to create in the first place and with significant changes to the Firefox 3 UI, updating themes from Firefox 2 could be a daunting task. Worse yet, getting a them to somehow support Firefox 2 and 3 in the same bundle is not trivial.
AMO was recently updated and is constantly improving to make things easier for add-on developers. Being able to host separate bundles for different versions of Firefox would be a big help.
The remaining non-updated add-ons will likely fade away after Firefox 3 is released unless the authors or someone else (with the author’s permission) decide to do the work needed to update to Firefox 3. Keep in mind, add-ons in the Top 100 have hundreds of thousands of daily users. Add-ons in the Top 10 have millions of daily users.
Just as in nature, “survival of the fittest” applies to add-ons too. Let’s hope we can avoid one of those mass extinctions.
Note: To those add-on developers who went through the effort to update your add-ons to Firefox 3 alpha or beta (1 or 2), please take the small amount of time needed to push your add-on to Firefox 3.0pre. Don’t let your users miss out on your add-on when it’s soooo close to completely updated.