Soon, developers of Firefox extensions have another option to deal with issues in the most recent version of their add-ons.
Mozilla writes: "If developing a revised version and obtaining a review won't address the issue quickly enough, you can roll back to an earlier version of your extension.".
The process relies on Firefox's check for extension updates. When a developer enables a roll back, Firefox will download and install the previous version of the extension the next time it checks for extension updates.
The only limitation of the feature is that at least two approved versions of an extension need to be available. On Mozilla's official add-ons store for Firefox, developers may only roll back to the version released before the one that requires the rollback.
Firefox add-on developers may roll back all users to earlier versions of their extensions now - gHacks Tech News
Firefox add-on developers may roll back to previous versions of their extensions going forward to deal with broken add-ons better.