Intent to Unship: <iframe mozbrowser> in content

Kris Maglione kmaglione at
Mon Feb 10 20:46:08 UTC 2020

<iframe mozbrowser> in non-chrome documents has been unsupported 
in production environments for some time. Maintaining support 
for it in content processes has become increasingly difficult in 
the light of Fission, to the point that we've decided it is time 
to fully remove support. Since support is disabled by default, 
and there is no user-visible way to enable it, there should be 
no users in the wild. The only in-tree users are tests, which 
will need to be updated by their owners or disabled.

Bug 1614462 will track this work.


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