Firefox 4.0b9 kills core functionality in version 2.0, 2.1b2

[xabolcs]

With the new beta (beta9) the BarTab doesn't work as expected: at startup all the tabs gets loaded.

STR:
0. take the beta9

1. take a new, empty profile
2. install BarTab (the public 2.0 or from the beta channel, 2.1b2)
3. open a few page
4. close firefox and start it again
5. all tabs gets loaded instantly

ps: in beta8 all things works like a charm
ps2: this bug is almost duplicate of #72
ps3: is this bug the opposite of #94 or am i in write-only mode?! :)

[hackel]

I am still seeing this, however now the tabs are greyed out, but they are still being loaded in the background. As soon as I load Firefox, I see my memory usage gradually increase to 2+ GB before it crashes.

[hackel]

Confirmed this behaviour in 4.0 b10 as well. The solution is to set browser.sessionstore.max_concurrent_tabs = 0 in about:config and TabBar works properly again.

[cheater]

the above not a solution, as the mechanism is not from within bartab. it's only a workaround.