What is the oldest usable version of Firefox in your PC?

[nnq2603]

I don't really have habit of archive old software. But for some reasons I really like Firefox 28 and still have a portable version of it in my old HDD. Still browsing without problem with most of the site but I refer to not use it nowaday because lack of addon support (just need 1 more addon but no longer available). Back in the day I don't like dark interface in software UI, but that changed 2 years ago. And at that point, about 2-3 years ago I couldn't find out any addon for Dark mode that works in my Firefox (still have adblock and 4-5 frequently used addon installed all along with it). I gave up on it, sometimes reopen just to see how it feels/looks with complete old skins. I use another browser now. I switch back and forth between Firefox and Opera, Opera went to Chromium at some point, only Firefox still remains as independent web engine browser...some random thoughts

Just notice this forum doesn't even have one single post. So this's the 1st one.

[Powerplayer]

Actually i made the forum yesterday we plan to expand there is a shitload of good stuff i will add later maybe even the old portable firefoxes , here is the other post by me foxclassic.proboards.com/thread/3/basilisk-waterfox-firefox56-portable-versions i always call basilisk poor mans waterfox had to make the portable version by reading instructions on other forums as there was none available , but it works much better