As another review says, this addOn seems unfinished. My particular complaint is as follows. On one run, a bookmark will be identified as broken. On another run, another bookmark will be identified as broken. Both bookmarks actually work fine. I infer that the addOn is not waiting long enough for sites to respond.

EDIT: I seem unable to respond to the developer's reply to my comment. So I will reply here. The AddOn seems to work better now but I continued to find at least one site that responded very slowly, but did respond, and was (mis?)flagged as not responding by the Organizer. That site: https://www.gutenberg.org/

It's really strange to have a duplicate finder that has a popup with no hotkey support. I have over 3,000 duplicates and there's no way I'm clicking 6,000 times to fix that using this addon. There needs to be a selection assistant, preferably something like Duplicate Cleaner has (this is not an addon, its a standalone software for files).

The results for checking broken bookmarks aren't visible until the whole search is done. I have over 15,000 bookmarks saved, I don't want to wait an hour and a half every time I want to clean out some broken bookmarks. It would be more usable if it could divide bookmarks up into batches so you can go for, say, checking just one thousand bookmarks at a time, preferably the latest 1,000 you added.

I hate to rate this addon two stars because this one technically works great, but the usability is so low that I really can't picture myself getting any work done with it.

brilliant! I've used so many worthless link checkers over the years I'd given up... until 'Bookmarks Organizer - it finds EVERY broken link, EVERY duplicate link, and enables you to redirect changed links - a HUNDRED MILLION THANKS to Sören Hentzschel!!

As others have said, this is HALF of a really great addon. The search and duplication check is fast and accurate. But then it's like the developer just decided that was good enough and stopped there. The inability to delete more than one bookmark at a time, and EACH deletion requires you to click a confirmation box, renders this completely and utterly useless.

BEWARE: This add-on DOES NOT copy tags when it replaces a redirected URL. If you have tags and value them do NOT use this to replace redirects. Destroying your data is unforgivable.

Also this has obviously not been used or tested on a large number of bookmarks (I have over 2000) and it is a usability nightmare for two main reasons.
First, there is no way to select multiple URLS and apply a single action (remove duplicate or change a redirect).
Second, there is no way to use the keyboard to navigate or interact with the dialogs so you are forced to move and click with the mouse.

I AM aware there is a "Change ALL redirects" but this is dangerous e.g. many websites redirect to a login screen when you are logged out so now all your bookmarks for those sites would be for the login screen. Once again you need to adress these one-bu-one which I DID do only to discover my tag data deleted.

This organizer only found 68 bookmarks. It did not find the bookmarks imported from another browser. They were there, tho.

Works badly enough to be unuseable.

Finds as "broken" perfectly working, recent, fast bookmarks, so you have to check one by one everything it finds.

Does not say why the link has an error. Eg. if it doesn't answer, is broken (404), has an authentication error (which can be OK since you are not logged on), etc. so the results are useless.

It is not possible to mass-delete a group of bookmarks anyway.

Quite slow altogether, even with a 1Gb link it's slow.

Doesn't cache the results even for a little time so if you inavertendly close the result windows while checking for actually broken links, you must start over again.

Can't stop a running task, so if you started over again and find it too long, you can't cancel it to search for something else.

Can't choose where to start or which folder to check, it's all or nothing.

Won't remove obsolete separation lines, so if you deleted a number of bookmarks you get a collection of useless separation lines in the folder.

Will do nothing to actually "organize" your bookmarks, the name is misleading.

You cannot whitelist a folder.

Bye bye.

Katastrophe: Sah nach einem zweiten Durchlauf alle meine Lesezeichen als Fehler an und löschte sämtliche. Tipp: vorher Lesezeichenbackup machen!

Great, functional and useful plugin! :-)

"finds" , but does not organize nor delete doubles - which isn't really helpful - since i already know i have doubles, firefox the usual culprit here. Manually deleting 2000+ bookmarks is certainly something i won't do. (buku /linux cli) but still searching for an Xmarks replacement for windows

Every DELETE must be confirmed -- if there are hundreds, just annoyng

The scan feature is extremely fast, the fastest from the extensions I've used of this nature thus far. However, the lack of a delete all or a checkbox system to make that part of the process faster makes this utterly useless unless you only have a handful of bookmarks. At which point, you could do everything this extension does manually anyway. To make matters, better or worse, when deleting a bookmark you have to manually confirm its deletion.

I don't know about other users, but the reason I need an extension like this is because my bookmarks are in the 10,000 range (actually used to be more like 50,000 but it got better). Because of this, not only is it important that the scan feature is reliable and relatively quick, but the ease of what comes next is also important.

It is a bookmarks checker. I have to delete duplicated bookmarks manually.

Works really good, look nice, just the pop-up warning should be able to be disabled

Excellent extension - I've had many bookmarks for 10+ years or older. Extension quickly identified the ones no longer working - duplicates and redirects. My initial bookmark count was 2119 now 769. No problems whatsoever with the extension