[Bug 196493]

[Bhidecuti]

Created attachment 9411024
Firefox not set as default browser

Hi Max,
Indeed, the issue no longer reproduces when installing the Firefox builds on Ubuntu 22.04 as advised via the link you provided (snap, deb, and tar.bz2 builds).

However, I have noticed that the reason why I was unable to set the Firefox browser as the default one is because I manually extracted the tar.bz2 file into a folder with a name containing spaces (e.g., 'new folder'). 
This can be reproduced with Firefox 128.0-build1 RC or latest Firefox Nightly 129.0a1 (2024-07-03). Upon clicking the "Make default..." button from about:preferences, the browser is not saved as default and and the error mentioned in Comment 3 is displayed in the browser console. 

I am attaching a video as well.

Could you please let me know if this is expected? Thank you in advance!

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Title:
  Launch web browser keyboard shortcut loads directory listing for home
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