Bugzilla

Thank you for filing the bug report and sharing the profile.

I just checked the logs. 
From the networking side, I don't see any problems. All the requests across the networks were successful.
Favicon was loaded as well
```
(nsHttp) HttpChannelChild::AsyncOpen [this=1de50800 uri=https://map.baidu.com/favicon.ico]

....
(nsHttp) HttpChannelChild::DoOnDataAvailable [this=1181ec00]
(nsHttp) nsHttpCompressConv 16888100 OnDataAvailable aSourceOffset:0 count:888
(nsHttp) nsHttpCompresssConv 16888100 brotlihandler decompress 888

...
(nsHttp) HttpChannelChild::OnStopRequest [this=1181f600 status=0]
```

We need to further check why loading is not completed from DOM side.