I use windows 7 with libreoffice 6.2, but everytime I select theme from firefox the result always “can’t find”. andthe thumnail always blank whatever i choose the category …
Yes,you cannot select the Firefox Themes with 6.2. I hope this will give some background to the problem.
Firefox have change their support for Themes (Personas) yet again. A decision has been made to provide LibreOffice specific support and include some Personas with LibO. This first new support is available in 6.2, and there are six coloured backgrounds available with the Personalization menu. These Personas are stored in the system /Gallery/Personas folder.
It is possible to use your own Personas which are stored in the user /Gallery/Personas folder. These can be selected by using the Expert Configuration Menu.
For more information on Personas support see https://bugs.documentfoundation.org/show_bug.cgi?id=123228.
I will add some documentation on how I use my own Personas with 6.2. However, I am sure that further changes will be made.
Stop relying on Mozilla. They are already looking at “pay for” services - never a good thing for users.