(Regression) Firefox failed with Password inputs or Log in.

Software tested: Firefox 48.0.2

ReactOS guilty commit: 0.4.15-dev-684-g448bced https://git.reactos.org/?p=reactos.git;a=commit;h=448bced

Steps to reproduce the issue:
1. Install ReactOS 32 bits.

2. Install the Firefox 48.0.2 available in RAPPS and open it.

3. Access to https://reactos.org/roslogin/?p=login and insert any user and pass. And press the button "Log in". Happens also in https://mobile.twitter.com or http://reactos.org.es/users.html (in the last only you need to type in password).

Expected resultant: Log in or the respective log fail page, as the ReactOS previous versions.

Resultant on master: Firefox crashes and I get a log.

ReactOS Login bug.txt

ReactOS-2021-08-07T22-40-06-415891900Z.webm

cc/ DougLyons