The plugin was also changed to use CFPreferences to store the list of MIME types that it has seen, rather than writing a STR# in a place that might be write-protected for the user. r=sdagley/beard.
git-svn-id: svn://10.0.0.236/branches/CHIMERA_M1_0_1_BRANCH@133723 18797224-902f-48f8-a5cc-f745e15eee43
