I've been facing a lot of problems over the past few days with my firefox android browser. Is there particularly some problem going on with the browser ?
What problems exactly ? Mine is working totally fine.
You should mention FireFox version, android version, what are you trying to do, what happens when you do it.
My firefox browser has become slow beyond imagination.
No problems here.
Moreover, it’s not fetching images for lemmy directly from my folders.
I don't know what this means. You mean that you can't browse through your images to upload something?
You mean that it's not using its local disk cache for images? I guess that could make a browser slower, but that seems like odd phrasing if that's what you're saying...
It's actually an Android thing. In order to improve security, they restricted that kind of access some versions back. Browsers can't browse local files, images, videos, gifs or whatever willy-nilly.