I am also experiencing performance issues when it comes to loading the content of the page in the Print Preview window. This issue is reproducible with both the old and new Print UI. I have used the Profiler tool in order to capture the profile as it follows: 1. [new Print UI](https://profiler.firefox.com/from-addon/calltree/?globalTrackOrder=7-8-9-0-1-2-3-4-5-6&hiddenGlobalTracks=1-2-3-5-6&hiddenLocalTracksByPid=19804-1-2-3~16776-0~20136-1-2~19048-0&localTrackOrderByPid=19804-4-0-1-2-3~16776-1-0~20136-0-1-2~19048-0~&thread=0&v=5) 2. [old Print UI](https://profiler.firefox.com/from-addon/calltree/?globalTrackOrder=7-8-9-0-1-2-3-4-5-6&hiddenGlobalTracks=1-2-3-4-6&hiddenLocalTracksByPid=21072-0-2-3-4~21284-1-2~17260-0&localTrackOrderByPid=21072-5-0-1-2-3-4~19168-0~21284-0-1-2~17260-0~&thread=0&v=5) Please note that I have also uploaded the files as attachments to this report in case the profiles are too big to be displayed smoothly using the links. **Environment:** - platform: Windows 10 x64 - browser versions: Firefox Release 74.0.1, Firefox Beta 75.0b4, Firefox Nightly 76.0a1 Please let me know if you need any additional information.
Bug 1679506 Comment 6 Edit History
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I am also experiencing performance issues when it comes to loading the content of the page in the Print Preview window. This issue is reproducible with both the old and new Print UI. I have used the Profiler tool in order to capture the profile as it follows: 1. [new Print UI](https://profiler.firefox.com/from-addon/calltree/?globalTrackOrder=7-8-9-0-1-2-3-4-5-6&hiddenGlobalTracks=1-2-3-5-6&hiddenLocalTracksByPid=19804-1-2-3~16776-0~20136-1-2~19048-0&localTrackOrderByPid=19804-4-0-1-2-3~16776-1-0~20136-0-1-2~19048-0~&thread=0&v=5) 2. [old Print UI](https://profiler.firefox.com/from-addon/calltree/?globalTrackOrder=7-8-9-0-1-2-3-4-5-6&hiddenGlobalTracks=1-2-3-4-6&hiddenLocalTracksByPid=21072-0-2-3-4~21284-1-2~17260-0&localTrackOrderByPid=21072-5-0-1-2-3-4~19168-0~21284-0-1-2~17260-0~&thread=0&v=5) Please note that I have also uploaded the files as attachments to this report in case the profiles are too big to be displayed smoothly using the links. **Environment:** - platform: Windows 10 x64 - browser versions: Firefox Release 84.0.1, Firefox Beta 85.0b4, Firefox Nightly 86.0a1 Please let me know if you need any additional information.