Bugzilla

### Beta/Release Uplift Approval Request
* **User impact if declined**: Amazon Assistant and likely other extensions seeing multiple connect events, resulting in broken functionality.
* **Is this code covered by automated tests?**: Yes
* **Has the fix been verified in Nightly?**: No
* **Needs manual test from QE?**: Yes
* **If yes, steps to reproduce**: See comment 0
* **List of other uplifts needed**: None
* **Risk to taking this patch**: Low
* **Why is the change risky/not risky? (and alternatives if risky)**: Small and well understood change, regression test included, and the rest of messaging api is covered by existing tests.
* **String changes made/needed**: None

### Beta/Release Uplift Approval Request
* **User impact if declined**: Amazon Assistant and likely other extensions seeing multiple onConnect events, resulting in broken functionality.
* **Is this code covered by automated tests?**: Yes
* **Has the fix been verified in Nightly?**: No
* **Needs manual test from QE?**: Yes
* **If yes, steps to reproduce**: See comment 0, use the specific version 10.2003.31.11559 from https://addons.mozilla.org/en-US/firefox/addon/amazon-browser-bar/versions/ (and/or using the minimal test case from comment 12).
* **List of other uplifts needed**: None
* **Risk to taking this patch**: Low
* **Why is the change risky/not risky? (and alternatives if risky)**: Small and well understood change, regression test included, and the rest of messaging api is covered by existing tests.
* **String changes made/needed**: None