possible obsolete or incorrect pref settings
A cypherpunks user has suggested that a number of our prefs may be obsolete or incorrect. Let's examine them and change any that need changing:
O [removed in esr17] Bug legacy/trac#6210 (closed): set plugin.expose_full_path to false O [removed in esr38] Bug legacy/trac#9012 (closed): Do not display the missing plugin information bar D [broken] Bug legacy/trac#9867 (closed): Flash is not click-to-play O* [removed in esr31] Bug legacy/trac#10703 (closed): Fallback charset enables fingerprinting of bundle localization O [FF has] Bug legacy/trac#11253 (closed): Turn on TLS 1.1 and 1.2 in TorBrowser O [removed in esr31] Bug legacy/trac#12212 (closed): Disable deprecated Audio Data API O [removed in esr38] Bug legacy/trac#15029 (moved): Tor Browser 4.5a4 prompts to install Flash O [FF has] Bug legacy/trac#17369 (moved): The RC4 cipher flags in TBB must be set to "false" by default