I have 4 Extensions on my Opera browser. Only 2 of them are enabled.
Save To Pocket is one extension that I do not have enabled. I just did a search for it, in the Extensions and it is no longer listed. It may have been one of the Extensions Google deleted or it just may be no longer supported by the developer?
So anyone who uses a browser that is Chromium based, may want to go into the Extensions and check to see if the Extensions you are using, are still listed as available.