mhrob

Oh and after installing the old extension, I DISABLED AUTOMATIC UPDATES in the Safari extensions preferences, otherwise I will be stuck with the same problem at the first update. That's fine with me, as long as I have the clipper back.

I was having the same problem as everybody here for over a year, i thought I had tried everything. Reading this thread, though,  I thought that MAYBE THE CULPRIT WAS THE NEW EXTENSION ITSELF (it updates in the background, leaving us unaware of the change: thus the  « it broke suddenly »).

So I connected an old MacBook that had an identical system, but had never been updated to the new Web Clipper extension, and lo and behold, after installing the old extension (6.9.0-b.25 (5134137/1.1.0.926). IT WORKS!

This was driving me crazy and I feel so much better now. Thank you all for putting me on the right track, finally.

—mh

MacBook Pro running TIGER: running High Sierra on the same machine, with the new clipper, never caused a problem.