Bug 925278 : use bedrock channel page instead of php one

* Add a bedrock redirect for firefox/channel
* include first locales ready: de, he
Merge pull request #1301 from pascalchevrel/Bug-925278_Make_firefox-channel_localizable

Bug 925278 : use bedrock channel page instead of php one
fix bug 923976 repair broken link
Merge pull request #1302 from shansm/broken-link-branch

fix bug 923976 repair broken link