TBB-Firefox sends OS+kernel in update queries to Mozilla

‘echelon’ in #tor reports that TBB-Firefox sends the current OS and kernel version to addons.mozilla.org:

2012-08-30 01:23:48 <echelon> https://addons.mozilla.org/blocklist/3/%7Bec8030f7-c20a-464f-9b0e-13a3a9e97384%7D/10.0.5/Firefox/20120608001639/Linux_x86-gcc3/en-US/default/Linux%202.6.37.6-smp%20(GTK%202.24.4)/default/default/20/20/3/

This is at least an information leak, and more seriously, Firefox's ‘extension blocklist’ could be used to disable Torbutton (or other preconfigured extensions) in TBB-Firefox.

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