[Bug 1405930]

[Alireza-fateh]

I changed the flag manually and it seems to have solved the problem but after this I am experiencing a bug that I am not sure if it is related to changing this flag or not.
When I have multiple tabs open, sometimes the tabs wont open when I click on them, meaning that Firefox shows that a new tab is clicked by bringing it forward but the page under the tab remains from the previous opened tab. 
Does anybody know what is causing this? 
p.s. Hardware acceleration is turned off in my Firefox settings. Everything else is set to default.

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Title:
  must press backspace twice to delete one Persian/Arabic character

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