

Note that you should not simply run the browser on your system as it picks up the default Firefox profile by default. Start by downloading a copy of Firefox ESR from the official website. While this may not be practicable in the long run, it may help out some users. You can run Firefox and a browser mentioned as an option above side by side.
Waterfox extensions install#
Your two main options are to install Firefox ESR and use it for the time being, or use a third-party Firefox compatible browser instead. In fact, some can only run legacy extensions and not WebExtensions. Third-party browsers compatible with Firefox - Pale Moon, Waterfox and SeaMonkey can run legacy extensions.It will do so until mid-2018 when the version of Firefox is upgraded to version 59. Firefox ESR 52.*Â - The extended support release supports legacy extensions.Nightly supports a switch for now, but many extensions don't work if you enable it. Firefox 57 or newer - Does not support legacy extensions.We published a guide on running legacy extensions once Firefox 57 comes along already.Īs far as support for legacy extensions is concerned, here is a short table that highlights the situation: That's bad if you rely on these extensions, and don't or can't use the browser without them.

While there is a chance that some may get updated to be compatible with Firefox's new extensions system, some won't.

All classic Firefox add-ons that are not WebExtensions at the time when you update to Firefox 57 are disabled automatically, and moved to the "new" legacy extensions section on about:addons.
