Bug 1554502 Comment 19 Edit History

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### Beta/Release Uplift Approval Request
* **User impact if declined**: Visual artifacts when WebRender is enabled on some page/extension combinations, including the Tree Style Tab
* **Is this code covered by automated tests?**: No
* **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)**: It makes behavior configurable that was otherwise hard-coded. No functional changes.
* **String changes made/needed**:
### Beta/Release Uplift Approval Request
* **User impact if declined**: Visual artifacts when WebRender is enabled on some page/extension combinations, including the Tree Style Tab
* **Is this code covered by automated tests?**: No
* **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)**: Non-risky, since it just makes batching more conservative.
* **String changes made/needed**:

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