adding *.swp to .gitignore
update deprecated package names
switch to MPL 2.0
strict mode and code cleanup
cleaned up key grouping in prefs dialog
key group cleanup; added devtools group
remove unnecessary prefs svc abstraction
remove unnecessary chrome pkg dependency
make sure the add-on works in private mode and windows
remove some superfluous function names
use some more sdk-provided window utils
clean up actions/ key labels