Help issue on recent Xubuntu releases (firefox snap)

[guiverc]

Not a serious issue, but not ideal

** Expected Result

Asking for app help will show help page in browser

** Actual Result

File not found

Firefox can’t find the file at /usr/share/sgt-puzzles/help/en/galaxies.html.

** Background

As reported on IRC (https://irclogs.ubuntu.com/2023/07/06/%23xubuntu.txt)

[22:20] Hi. I like to solve an apparent bug on help of SGT puzzles. Launch SGT puzzle, then launch any game. On menu Help > Help on , it opens a browser (firefox in my case) but shows "file not found" error and the path to html file. However, html files are actually there. I can view them with lynx for instance
[22:20] I use Xubuntu.
[22:21] frasson, this is probably due to firefox being a snap, which is constrained and can't access files outside

I can confirm this on my mantic system, with the following issue noted in firefox (snap)

This is a Ubuntu specific I too believe on modern Ubuntu releases where the default browser runs contained (snap package).

(filed here as launchpad indicated bugs are tracked here)