How to deal with the differences of Chrome & Firefox?

[flosse]

How do we want to deal with the differences in the APIs of the various browsers?

For example in Firefox the tab field discarded is optional but in chrome it is mandatory.
Even more problematic is that e.g. the tab field hidden is not present in chrome at all but in Firefox.
Also MV3 is required for Chrome extensions but Firefox does not support MV3 yet.

Some possible approaches:

• use feature flags
• only implement APIs that are identical across browsers
• make conflicting fields optional and/or do runtime checks and return corresponding errors
• ignore Firefox

[hendursaga]

MV3 has been available in Firefox browsers for some time now. I'm sure there are some differences, still.