Steps to Reproduce: 1. Install Version 49.0 of the addon on e10s-enabled nightly/aurora: https://addons.mozilla.org/en-US/firefox/addon/youtube-high-definition/ 2.Go to any youtube video 3. Click the addon from the toolbar for setting options 4. Select video quality /video size Actual Result: Dialog appears with the message “This is not a YouTube page. Would you like to open up a YouTube page to try the setting” Expected Result: User should be able to change settings in e10s enabled browser. Note: It is e10s specific. E10s enabled & interposition set to true/false - fails. E10s disabled & interposition set to true/false - pass.
Is this still happening in the latest version of the add-on (49.1)?
Yes, I can still reproduce it in Windows 10 with latest nightly. Here is a screen capture: https://testing-1.tinytake.com/sf/MTEwMzI1Nl80Mzg1Njcx -- Version 52.0a1 Build ID 20161106030203 Update Channel nightly User Agent Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
Thank you for testing! The developer has been informed.