To enable form fill in Firefox for Android:

Type "about:config" in the Firefox location bar, and press Enter or Go Search for "formfill" Tap on the "browser.formfill.enable" preference, then press the toggle switch to change it from "false" to "true"

Sidharth Bhandari (Rubin) said

To enable form fill in Firefox for Android: Type "about:config" in the Firefox location bar, and press Enter or Go Search for "formfill" Tap on the "browser.formfill.enable" preference, then press the toggle switch to change it from "false" to "true"

Its already set as true and firefox autofilling is working but only if you have one username and password stored for a site. If you have multiple accounts for a site and have more than one username and password stored, autofilling will not work.

You can manage the passwords by using password manager add on: *https://addons.mozilla.org/eN-US/andr.../?src=hp-dl-featured

guigs2 said

You can manage the passwords by using password manager add on: *https://addons.mozilla.org/eN-US/andr.../?src=hp-dl-featured

Thanks I know this addon but this has nothing to do with the problem I mentioned,

Hi sherif01111, It does, its an offered work around in the meantime while the issue is investigated. I would also recommend filling a bug with a use case of two different sites with steps to reproduce in bugzillla.

I have seen other bug reports, but they were closed ie: https://bugzilla.mozilla.org/show_bug.cgi?id=278275