Bug 876145: fix authentication dialog in browser (wrong attribute)

Replace l10n-id with data-l10n-id in browser. As it is, the
authentication dialog's title is always displayed in English.
Bug 877960: followup to check the pref by default.
Merge remote-tracking branch 'upstream/master'
merge
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Bug 876703 - [Browser] Make activity filter case insensitive on URL protocol (http://).
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Bug 856074 - Controls on the call screen should be disabled until the call is reported connecting when dialing emergency number in airplane mode
Merge remote-tracking branch 'upstream/master'
Bug 879661 - Unit test of internet_sharing.js failed frequently.
Bug 875355 - update font prefs
Merge remote-tracking branch 'upstream/master'
Revert "Merge pull request #10018 from huchengtw-moz/sms/Bug_875564_after_attaching_image_sometimes_send_button_is_still_disabled"

Bug 875564 - [MMS] after attaching image, sometimes send button is still disabled. r=steveck-chung

This reverts commit e19c6980de1089af7a120be4b49d49a6bb5d28e4, reversing
changes made to b3dd91ed197f96c698f03e1f67de3a7602d46880.
Bug 874289 - modify open activities of Video and Music to handle errors
Merge remote-tracking branch 'upstream/master'
Bug 879869 - Disable startup/shutdown sound by default r=lightsofapollo
Bug 879533: don't display user's input if we don't have any suggestions