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Dozens of open tabs lost! Synced them, reinstalled Windows and Firefox, set up Sync, looked up "tabs on other devices" in history -> Only a third or so listed.

Usually, when I reinstall Windows, I manually backup my Firefox bookmarks and open tabs, but because Sync has worked perfectly for me in the past, I didn't do it this time. I backed up all my other files and settings and whatnot from the rest of my system, then in Firefox I hit the Sync button (put in on the GUI so I see if it's syncing or done) for the last time, waited until the green rotating dot was gone, closed Firefox, shut down the system, formatted the drive and reinstalled Windows and Firefox. After setting up Sync I waited a while to make sure everything is on my system. Then I wanted to have all the tabs and windows open as I had on the old system, so I went to the history and "tabs on other devices". I could already see from the small size of the list, that tabs were missing. I went through all of them, opened them and sorted them into windows. -> Maybe about two thirds of the tabs I had open on my old system are gone! Not just new tabs that might not have been synced (although the button showed sync was complete), but also old tabs (from weeks ago) that must have been synced before. Actually maybe especially or even only the old ones are lost. And the lost tabs are not just from one of the open windows, but from several.

What can I do to recover my lost tabs? They contain important websites that I didn't bookmark yet, articles that I wanted to read, windows with dozens of tabs on a topic that I did some research for and stuff like that.

What does the green circle mean? Does it indicate that the sync is complete (to the Firefox servers) or just that the changes have been saved locally and set up for some next scheduled sync with the Firefox servers?

Further info: I always run the newest stable release of Firefox (v19 on both systems). Old system was Windows 8 Enterprise Evaluation, new system is Windows 8 Pro. My used Sync quota is about 10 MB. I had 4 Firefox windows open with different amount of tabs in each of them, from 10 to maybe 80 with an overall amount of 150-200. Most of them weren't loaded. Firefox start is set to "load last session" and tabs are set to "load when selected". Memory usage 500 MB - 1 GB.

The original computer utilized to sync all other computers crashed and had to be reloaded. I am still able to add other components/computers to include the original computer now that it has been reloaded, but only through the pairing option. Is there a way to convert one of the working synced computers to now be a Primary Computer?

I set up Firefox Sync on a computer with a large monitor (a TV actuall) and I had to increase the DPI in the Gnome monitor settings in order for text to be readable on the large monitor. Now, using Firefox Sync on a laptop with a much smaller monitor, it appears the DPI settings have been synced for Gmail. Gmail somehow stores this information and Firefox has synced it. Is there a way to avoid this? Perhaps I should ask Google instead?

The main feature that attracts me in Firefox for Android is the ability to synch my Bookmarks with the desktop browser. It does synch the Bookmarks, however, the folder tree of the Desktop Bookmarks is completely messed up and out of order compare to the desktop browser, which makes it difficult to find what I need. It happens both on my tablet and my phone. And there is no option to edit the bookmarks (move them in the proper position). Why is it happening, and is there any way fix this?

I use separate Firefox Profiles for different purposes, each with it's own set of bookmarks. On XMarks, it is relatively simple to have different profiles, but can the same thing be done in Firefox sync? One account, multiple profiles.

Is there any way to access a screen that shows or lists all the devices that you have previously synched to your Firefox Sync account? (desktops, laptops, + mobile devices)

when i left my job and gave them back my laptop i obviously kept the sync key and thought it would be fine to simply come along and enter the details into my new computer and away i go ... like i did when i got the laptop in the first place.

However when i entered all the information it said it had imported it and there were no links, bookmarks, password, history ... nothing.

Is there a way i can find out why this is happening. it can't have overwritten them as i selected the option to sync what is local and on the server.

any ideas.

I have been looking through the documentation for the weave server and have found no way to modify how much history is kept the whole purpose of using the home server was so that i could put a enormous quota and save every thing securely and privatly. 60 days is a joke as I have to come back to projects a year or 3 later and have 200 or so tabs open daily across 4 browser windows per pc i use. I use seperate profiles for seprate aspects of life... ex hobbies vs coding vs work. each gets its own profile and sync account so that when i work on multiple systems or have to redo pc's its much easier to keep things sorted out.