@mafi0z

Exactly...

Hey Telega - Good news!! I upgraded to FD2.9 and.... so far, so good. Had to do a bit of tweaking and re-arranging bookmarks but rebooted afterwards and no more multiple bookmarks and changes made stayed this time. I noticed that any Folders created from a particular time don't have the same settings (page format, colours, etc) as my earlier setup but I'm sure I can fix that easily.

One thing I did wonder about though. I noticed when I was re-organising my bookmarks in Firefox, that there are 2 folders -

One is Recently Bookmarked and none of the bookmarks that were in there before I started re-organising were 'Recent Bookmarks' - they were quite old and nothing I had bookmarked recently were in there. Is there a way to clear this folder, without deleting the bookmarks so it can start fresh?

The other is Most Visited in Bookmarks Toolbar. Before I re-organised bookmarks just now, the bookmarks in that folder included some, if not all, of those rogue bookmarks which had been multiplying.

Not sure if any of the above would have had a bearing on the problems but just though I'd mention it anyway.

For now though - FD2.9 has fixed the problem. Thank you so much to everyone who has helped fix the bookmark issue - I hope this latest upgrade works for everyone else who has been having problems too.

Just a quick update. Still going good - no more multiplying bookmarks. Haven't tried to re-organise FD Home Page in v2.9 yet so will let you know if any issues then (will start a new forum topic on FD2.9).

While I was fixing things up though, I thought about something else that might have contributed to the problems I was having. I use the FF extension Permanent Tab (constantly) and usually have FD marked with Permanent Tab so it is always one of the tabs which opens when I start or restart FF. I probably had FD marked as a permanent tab throughout the upgrades and re-organising multiplying bookmarks saga. Just thought I'd mention this too.

what are "permanent" tabs?

u say u :
"usually have FD marked with Permanent Tab so it is always one of the tabs which opens when I start or restart FF"
u can have FD open on firefox startup very easily - choose "show blank page"

image taken from: http://userlogos.org/node/1843

Mafi0z - Permatabs is awesome! A couple of examples of what I use it for -

If I come across a site that looks interesting while I'm doing something else, I'll right click and select Permanent Tab from the context menu. That stops me from getting distracted from what I should be doing till I'm ready to, or have time to look at it. I can restart FF, reboot my computer and when FF re-opens, any tabs I have marked 'Permanent Tab' come up straight away. The thing I like about Permanent Tabbing is that it keeps things in my face whenever FF is open.

I know I can make FD my home page, but using Permatabs is not so permanent. If for any reason I don't want FD to open when I restart FF, I can just right click and deselect Permanent Tab rather than having to go into Internet Options and change my home page. I might do this once FD is more stable though and I have worked out how to get it looking like I would like for my home page.