Bug#870256: Loosing focus after using spellcheck replacement

[Alex ARNAUD]

Package: firefox
Version: 54.0-2
Tags: a11y
Owner: bugs at hypra.fr
User: bugs at hypra.fr
Usertags: hypra
Forwarded: https://bugzilla.mozilla.org/show_bug.cgi?id=1384987

DESCRIPTION FROM UPSTREAM:

"Dear all,

 From the migration to e10s Firefox no longer sends the correct events 
when coming back in a form field after opening the context menu. Users 
would to open this menu to check miss spelled word.

Steps to reproduce:
1. Enable e10s
2. Focus on an input text
3. Type miss spelled word
4. Use context menu and replace with a suggestion.


Actual results:

The focus is lost, impossible to continue to input text.


Expected results:

The focus should be still enabled."