The photon UI under photon.lemmy.world does not work for me in Firefox 122 under Linux, showing nothing but blank page when I open it. It works in Chromium and in Firefox on Android.
When I open the developer console, I get the following error message:
Uncaught (in promise) TypeError: e.moderation is undefined
Hey, that actually did it! Not cookies, technically, but "local storage", but anyway...
Thanks for the hint!
*edit: In retrospect, I should have saved what Photon had saved there in local storage. This was definitely still a bug, Photon, like any other web application, really, must be able to deal with data stored by older versions of itself, even if those older versions were buggy.
Turn off all your extensions and turn them back on one by one to see if that’s the cause.
There's really not much there. There is uBlock Origin (already deactivated in the screenshot), HTTPS Everywhere (all that does is redirect http websites to their https equivalent, but this was already using https anyway), Greasemonkey (Not configured to do anything on this URL) and finally RES (doesn't have permissions to do anything outside of reddit)...
Anyway, I disabled all of those in Firefox' Add-On page (so not just via their own disable buttons), reloaded the page and... no difference. Still just a blank page.