My Add-on appearance does not show even if I enable it.
I once had this add-on appearance when opening Mozilla Fox. After some computer automatic update, the add-on appearance disappeared. I can find it, it is enabled, but no picture is displayed. I tried downloading other appearances, but none of them worked as well.
Solution choisie
Make sure that you do not run Firefox in (permanent) Private Browsing mode.
- Tools > Options > Privacy > Firefox will: "Use custom settings for history"
- Deselect: [ ] "Always use private browsing mode"
When you are in Private Browsing mode then the persona is disabled and you get the default theme and possibly a purple PB icon in the Firefox menu button or the right end side of the menu bar (tab bar on Linux) and "(Private Browsing)" appended to the title bar.
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Solution choisie
Make sure that you do not run Firefox in (permanent) Private Browsing mode.
- Tools > Options > Privacy > Firefox will: "Use custom settings for history"
- Deselect: [ ] "Always use private browsing mode"
When you are in Private Browsing mode then the persona is disabled and you get the default theme and possibly a purple PB icon in the Firefox menu button or the right end side of the menu bar (tab bar on Linux) and "(Private Browsing)" appended to the title bar.