Bugzilla

Thank you for the bug report, Andrew.

Could you please navigate to about:support, click "copy text to clipboard" and [attach](https://bugzilla.mozilla.org/attachment.cgi?bugid=1850195&action=enter) the contents to this bug?

Could you also test whether this works correctly in the current release or nightly version of firefox?

It would also be very helpful if you could capture a performance profile of firefox starting. To do this, close any open instances of firefox. Then launch firefox from the command line with the following environment variable set:

```
MOZ_PROFILER_STARTUP=1 firefox
```

When the firefox window opens, there should be a blue speed dial icon in the toolbar. Click on this to stop the profiler. This should open up the profiler UI in a new tab. At the top right there will be a button labeled "Upload local profile". Click on that, then paste the URL it gives you here.

Let me know if you need any help with any of that. Thanks!

Thank you for the bug report, Andrew.

Could you please navigate to about:support, click "copy text to clipboard" and [attach](https://bugzilla.mozilla.org/attachment.cgi?bugid=1850195&action=enter) the contents to this bug?

Could you also test whether this works correctly in the current release or nightly version of firefox?

It would also be very helpful if you could capture a performance profile of firefox starting. To do this, close any open instances of firefox. Then launch firefox from the command line with the following environment variable set:

```
MOZ_PROFILER_STARTUP=1 firefox
```

When the firefox window opens, there should be a blue speed dial icon in the toolbar. Click on this to stop the profiler. This should open up the profiler UI in a new tab. At the top right there will be a button labeled "Upload local profile". Click on that, then copy and paste the URL it gives you here.

Let me know if you need any help with any of that. Thanks!