I haven’t maintained my public extension for over 2 years, but am planning on keeping it compatible with future versions of FF.
Where would I look for breaking changes, so that I can react in time?
For example, I think one needs to upgrade to manifest version 3 at some point?
But I reckon the manifest version might not be the only thing I have to worry about wrt future compatibility(?)
There are no deadlines yet regarding Manifest V3 in Firefox and even Chrome is moving the deadline yet again.
Note that if you release MV3 version for Firefox now, it won’t work for existing Firefox ESR 102 users. So it’s best to wait at least till the next ESR in September 2023.
Other than that, everything should be more less compatible, you can see detailed change-logs here:
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