Re: HyperSnap FF Addon not working with FF Quantum 64.0 (64-bit)
I really don't know why it behaves differently on your system. Maybe it is some security setting of your Firefox, to prohibit add-ons (or extensions) installation from other software. Maybe try this: enter again into the address bar:
The "Extensions" tab on the left should be active. Press the gear button near top right, to the right of "Manage your extensions" header. A menu pops up, press "Install Add-on From File...". A standard Windows "open file" dialog appears. Navigate to the folder in which you installed HyperSnap 8, usually it would be:
C:\Program Files\HyperSnap 8
folder. In that folder, click on "hsnaphlp-s.xpi" file and click the "Open" button near bottom right. A prompt saying "Add HyperSnap Extension?" should appear, also listing its permissions. Click Add. It should work from now on. If it does not work, but shows some error message, maybe at least we'd learn what it wants. Or maybe the file hsnaphlp-s.xpi is damaged in your setup? In that case first reinstalling HyperSnap 8 should help.