cannot download "featured" extensions
today, 3 May, all (5) extensions in FF were deemed "unsupported" including AdBlock Plus. could not download a replacement because "featured" extensions download attempt displays a red barred message "Download failed. Please check your connection."
Alle svar (2)
Sorry, the Add-ons team is working on a fix for this. It looks like a certificate used to sign many popular extensions expired. (The verification process checks that certificate.)
I don't know how soon re-signed versions of those extensions will become available, or whether another workaround will be discovered. We are all hoping to learn more soon.
thx, seems ok now - 4 May AM