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Sync no longer works after update to Firefox 29

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After my desktop Firefox automatically updated to version 29, I can no longer see "tabs from other computers". Not my Firefox at work (updated by administrator after extensive reviews), not my Firefox for Android (updated via Android Market), not my Firefox on my Macbook (version 28), not my Firefox on my Linux and Windows machines.

Note: Updating all firefox instances on the sync account at the same time is NOT an option. Especially since not all of them are administred by me.

After my desktop Firefox automatically updated to version 29, I can no longer see "tabs from other computers". Not my Firefox at work (updated by administrator after extensive reviews), not my Firefox for Android (updated via Android Market), not my Firefox on my Macbook (version 28), not my Firefox on my Linux and Windows machines. Note: Updating all firefox instances on the sync account at the same time is NOT an option. Especially since not all of them are administred by me.

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"The new version of Sync only works with the latest Firefox and you can't use both the old and new Sync at the same time. "

I don't want any new sync. I want the old sync that works with all the clients I have, that I have no power to update myself! This is a very common situation after all.

"While the old version of Sync will continue to work..." ...aparently not. That browser never asked to update to any new version of Weave/Sync, so it should still be on the old one.