I have a desktop and laptop both with FF installed and synced and they ALWAYS load identical. Yesterday I set up my my new desktop in my office and I installed FF and when I logged onto my account my FF stayed the default color. This never happened before, and as I turned and looked at my old desktop I saw that it too now had the wrong theme. So I went into my kitchen were I have my laptop set up (it just upgraded itself to win 11 and I am using it as a training tool) the FF on it was no longer appearing correctly. I have since spent 30 some hours uninstalling/reinstalling FF/ deleting my profile, remaking my profile, re-deleting my profile and making another new profile using a different email and when I install FF on ANY OTHER pc it will not load correctly, especially themes and add ons. What the hell is causing this and how do I fix it?? On every PC I used my Revo Uninstaller Pro to uninstall FF including file remnants and then meticulously scrubbed repeatedly each PC for any leftover registry and file remnants, and then I used my file eraser program to wipe all the file slack. If this is going to be an issue why have FF ? I spend enough time now keeping Edge disabled and dont want my fav primary browser to become a "High Maintenance" browser having to spend time EVERY TIME I TURN ON MY PC fixing this, repeatedly. Its like having to add water to your cooling system every time you start up your car before you can use it. Any help would be enormously appreciated. The trouble shooting information below is for the first install tonight after getting home and making the newest profile and it is seemingly staying correct, the next install on my laptop is incorrect, it has one deleted theme installed yet is "using" the default theme and the correct theme I picked is not even showing.