Worked fine 'til yesterday, but now it doesn't work at all on Firefox 114.0.2x64. It doesn't sync/download/upload/merge. Reinstalled extension (now 18.5.7) doesn't solve. Seems still working fine in Chrome.

Да , со СПИД-ДАЙЛом подстава конечно... Мозилловцы лютуют :) Надеюсь разберутся вскоре и вернут всё на место, по крайней мере так пишут на форуме.

When it functions correctly it the best.

Good bookmarks saver, use it on different browsers, has some obscure behaviour sometimes. Needs a smoother interface.

stable, works great, a lifesaver

...