Disable dom.event.clipboardevents.enabled by default in TBB
It's been established (e.g., http://beta.slashdot.org/story/129898) that by using dom.event.clipboardevents websites are able to monitor the text that a user cuts, copies, or pastes and record it on their system.
An option to disable this code for increased privacy led to a fix given by https://bugzilla.mozilla.org/show_bug.cgi?id=542938, but freshly-packaged installs of Firefox (and hence, Tor 0.2.4.22/Tor Browser Bundle 3.6.2) come with it enabled by default.
Shouldn't we turn this off for increased privacy? I don't think it has as much use in TBB as it does in Firefox, and could be considered a privacy leak if the user in question is copying passwords or other sensitive data.