STR: 1. Download German locale version of Nightly from https://www.mozilla.org/en-US/firefox/all/#product-desktop-nightly2. Create a brand new profile for that instance of Nightly3. Launch the German instance of Nightly with the new profile4. Visit https://www.youtube.com5. Try to watch any video. ER: The video should play smoothly. AR: Long, multi-second main-thread hangs. The video eventually fails to play and displays an error message (I'll attach a screenshot with the error message).
Bug 1598356 Comment 0 Edit History
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STR: 1. Download German locale version of Nightly from https://www.mozilla.org/en-US/firefox/all/#product-desktop-nightly 2. Create a brand new profile for that instance of Nightly 3. Launch the German instance of Nightly with the new profile 4. Visit https://www.youtube.com 5. Try to watch any video. ER: The video should play smoothly. AR: Long, multi-second main-thread hangs. The video eventually fails to play and displays an error message (I'll attach a screenshot with the error message).
STR: 1. Download German locale version of Nightly from https://www.mozilla.org/en-US/firefox/all/#product-desktop-nightly, but do not install it 2. Launch the German instance of Nightly with the new profile by running it from the .dmg Disk Image 3. Visit https://www.youtube.com 4. Try to watch any video. ER: The video should play smoothly. AR: Long, multi-second main-thread hangs. The video eventually fails to play and displays an error message (I'll attach a screenshot with the error message).