Documentation would be nice, but worth the gamble. Rated 5 out of 5 stars

I still have no clue how this tool works, but am glad I heeded the great reviews here. I ran the full kit [after backing up], & this add-on solved an intolerable problem.

[Also glad I ignored all the advice--including some from Mozilla--suggesting users worry about too many bookmarks, how deeply they're nested, etc. Rubbish. What's the point of a fast PC w/ample RAM if you can't count on it to remember all the stuff you need?]