Check the file name for capitalization or other typing errors.
   Check to see if the file was moved, renamed or deleted.

I am trying to open .html files located on my hard drive, but Firefox gives the error: File not found Firefox can’t find the file at /usr/share/gimp/2.0/help/en/gimp-pimping.html. Check the file name for capitalization or other typing errors. Check to see if the file was moved, renamed or deleted. I can see the files at this location and even when I directly open the files from that location by double clicking them, I get this error. I have seen on Ubuntu forums that this might be a problem with the actual Firefox snap, any official help would be appreciated. Thanks.