ਜੂਨ 9, 2015 ਤੇ Dagger (Developer) ਵੱਲੋਂ · ਪਰਮਾਲਿੰਕ

It basically comes down to a) if old versions break, I won't notice (since I won't test against them) and I just won't care enough about them to fix the breakage anyway, b) I want to use new JS language and Firefox features.

I suppose both of these roughly boil down to laziness. Sorry.

For what it's worth, I think current versions (certainly up to 0.8.4) will actually work on Fx10 if you turn off version checking. The next version will need Fx24 though, and I may be forced to bump it even higher for e10s support in the future (but anything higher than 28 means Australis, which I don't really want to force people to use...)