The Mozilla Firefox Commentariat has crucified me for trying to maintain 24,436 bookmarks. Explicative omitted. That's how I conduct my online life. For those commentarians: I ONLY use firefox because of its bookmark manager: by far the best in the business. But, of course, the stock system cannot be bothered with maintaining 24,436 bookmarks.
Gee, anybody trying to do that is a moron. NOT. The author of Places Maintenance gets that. Ever since a helpful member of the Mozilla Firefox Commentariat (yes, there are one or two of you out there :-) introduced me to Places Maintenance, ALL OF MY BOOKMARK MAINTENANCE PROBLEMS have disappeared. Things just "work like they should". Oh, no... that's Apple Kool-Aid according to most Mozilla Firefox Commentarians. I guess they don't think that things should just work.
Anyway, the author of Places Maintenance seems to understand how to fix the underlying deficiencies in Firefox relating to bookmark maintenace. Whoever you are... thank you, thank you, thank you!
Meanwhile, Places Maintenance maintenance seems to have ceased some versions ago. Current information suggests "38.0-56.*". Well, I'd be entire willing to submit $100 - perhaps up to $500 - to convince the author to update PM (and continue to deal with their BS as they update in the future) to whatever latest version of FF the Mozilla Galactic Empire deigns to release.
Don't give me shit, guys. Just do your job and support 10s/100s of thousands of bookmarks... or else convince the author of PM to do your job for you.