The extension uses a new setting in 0.22, but it is buggy in old Firefox.

The bug prevents the extension from install on Firefox < 128:
https://bugzilla.mozilla.org/show_bug.cgi?id=1996829

Currently the bug is fixed at Firefox ESR 115.31 (which should be released around Dec 9), but I think 116~127 will still face the bug.

If you need a version without the new setting, feel free to comment in this thread:
https://github.com/eight04/image-picka/issues/380