I copied recursive all directories
I had to reinstall the extensions, they were still listed under
Extensions, but not working and the icons were gone
I am glad that you have solved you problem!
For understanding:
(1) So, for testing purpose you simply copied ALL the content of the old
profile's directory to the new profile's directory.
(2) And after this test showed promising results then you once more
created a new profile, but this time have only copied the files of
interest to it, the ones which are explicitly emphasized on the support
page:
https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile
Finally, as announced on the support page, the extensions still needed
to become reinstalled.
Did I understand it correctly?
