I just wasted 3 hours trying to figure out why my ComfyUI (local AI image generator) stopped working with Firefox. There were no error messages from ComfyUI, it just failed to load workflow files. It turns out that it's because Firefox is installed as a snap package and wherever the snap configuration for Firefox lives thinks it knows better than I do what files and directories on my system I can access in Firefox. I also had this problem with trying to open PDFs in my home directory where I kept getting access denied errors. I tried to solve the problems with the snap version and found several proposed solutions by google search which people claimed worked but did not. I finally found a web page that described how to uninstall the snap package and install an alternate non-snap version of Firefox, and now everything works like I expect it to. How do I make sure this snap version does not ever come back?