[Bug 1914147]

[Kershaw-6]

Comment on attachment 9197123
Bug 1679933 - Call EnsureNSSInitializedChromeOrContent() during nsHttpHandler initialization

### Beta/Release Uplift Approval Request
* **User impact if declined**: Firefox could freeze on start up.
See bug 1689032. It seems we have some users reported the same issue.
* **Is this code covered by automated tests?**: Yes
* **Has the fix been verified in Nightly?**: Yes
* **Needs manual test from QE?**: No
* **If yes, steps to reproduce**: 
* **List of other uplifts needed**: None
* **Risk to taking this patch**: Low
* **Why is the change risky/not risky? (and alternatives if risky)**: This patch is quite straightforward and this patch is already on beta and nightly for a while.
* **String changes made/needed**: N/A

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Title:
  [upstream] Firefox 85 hangs at startup

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