TB152.0.1 (Windows 11 64-bit) add-ons/extensions not working

I've just transferred my profile to a new computer, for which I downloaded TB152 (had been running TB128), and '''''no''''' add-ons/extensions work. Of course many were rendered inoperative with the update, but that's not the issue, because: # Even those which claim to be compatible, or were updated since the transfer for the purpose of extension compatibility, do not work. # Moreover, when I invoke the Add-ons Manager to inquire about the various non-working extensions, ''none'' of the links (which '''''can''''' be seen and read by the OS), can be invoked or even ''copied'' (to be, for example, pasted into a browser window). I went through the standard [[Mozilla Support diagnostics|https://support.mozilla.org/en-US/kb/hyperlinks-in-messages-not-working]] and found no answers. Can someone suggest a next step? Trying to understand why this problem is related only to the extensions, I examined the profile's "'''extensions'''" folder. There are 40 '''.xpi''' files (same as the number of mostly-disabled (and mostly-expired) extensions in the Add-ons Manager), along with a subdirectory named "'''staged'''" containing 7 empty folders with what appear to be '''.xpi''' filenames - though none of those empty-folder-filenames match any of the '''.xpi''' files in the parent "'''extensions'''" folder. Because the "'''staged'''" folder has a recent timestamp (apparently the last time TB shut down), it seems to have some significance to TB operation - but what can be the use of it is more than I can see. What is the significance of that folder and its contents? Two final (and possibly related) questions about this "'''extensions'''" folder: # Is there any way to relate the '''<filename>.xpi''' to the name in the '''Add-ons Manager'''? # Since nothing in the "'''extensions'''" folder identifies which are enabled, there must be some file containing a functional description of the folder's contents. Where would that be? Grateful for any pointers, -John