Bugzilla

### Beta/Release Uplift Approval Request
* **User impact if declined**: There will be web compat breakage and some sites using workers will not work.
* **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**: This website should work without breakage https://bugzilla.mozilla.org/show_bug.cgi?id=1818732  (see 1818732) and this script should return "false" on beta: https://stackoverflow.com/questions/62954570/javascript-feature-detect-module-support-for-web-workers
* **List of other uplifts needed**: None
* **Risk to taking this patch**: Low
* **Why is the change risky/not risky? (and alternatives if risky)**: There is some risk that some webcompat is still missing, but this hopefully got everything.
* **String changes made/needed**: 
* **Is Android affected?**: Yes

### Beta/Release Uplift Approval Request
* **User impact if declined**: There will be web compat breakage and some sites using workers will not work.
* **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**: This website should work without breakage https://web.dilato.app  (see 1818732) and this script should return "false" on beta: https://stackoverflow.com/questions/62954570/javascript-feature-detect-module-support-for-web-workers
* **List of other uplifts needed**: None
* **Risk to taking this patch**: Low
* **Why is the change risky/not risky? (and alternatives if risky)**: There is some risk that some webcompat is still missing, but this hopefully got everything.
* **String changes made/needed**: 
* **Is Android affected?**: Yes