Notes
*I created this bug based on discussions from bug 1526355/#block_autoplay slack channel

Affected versions

• Nightly Fx 67.0a1 BuildID: 20190310214003
  Beta Fx 66.0b14
  Affected platforms
  *Win 10 x64
  Win 7 x32
  Ubuntu 18.04 LTS
  Ubuntu 16.04 LTS
  macOS 10.13

Steps to reproduce
Preconditions:
media.autoplay.default = 1
media.autoplay.enabled.user-gestures-needed = true

Open a new window.
Reach https://www.arcticmonkeys.com/
Check the Site Information panel.
Travel to another open tab.
Go back to the arctic monkeys tab.

Expected result
*The block autoplay icon is displayed.

Actual result
*The block autoplay icon is not displayed after returning to the arctic monkeys website.

Regression range
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=73f92838946aac0aab5760bada1a1e8e2218a3e1&tochange=3f5a132b7e4f7579209ca906f9ec79059e426f26

Additional notes
The Block/Allow options are not displayed when first reaching the Arctic Monkeys website.

ok, really not sure what was up with my build but I can reproduce this now

Ok, so its a race condition, the block autoplay message is received before the page has loaded, the progresslistener reports the page loading as a navigation and clears the permission so the next tine the UI is drawn the icon doesnt show

The fix is simple, trying to make a test for it now

https://hg.mozilla.org/mozilla-central/rev/ed8f17a27c82

Hi Dale,since 67 is marked as affected, should we consider uplifting this to Beta67? If yes, please nominate a patch for uplift.

Comment on attachment 9051661 [details]
Bug 1534219 - Only clear globally blocked permission on navigation. r=johannh

Beta/Release Uplift Approval Request

• Feature/Bug causing the regression: None
• User impact if declined: Icon will not be shown on some sites that have autoplay media blocked
• Is this code covered by automated tests?: Yes
• Has the fix been verified in Nightly?: No
• Needs manual test from QE?: Yes
• If yes, steps to reproduce: Described in https://bugzilla.mozilla.org/show_bug.cgi?id=1534219#c0
• List of other uplifts needed: None
• Risk to taking this patch: Low
• Why is the change risky/not risky? (and alternatives if risky): Small patch with very little chance of regressing
• String changes made/needed:

Comment on attachment 9051661 [details]
Bug 1534219 - Only clear globally blocked permission on navigation. r=johannh

FYI, I'll take this patch in beta once it has been verified by QA on Nightly.

Hello,

I verified that this issue is fixed on Nightly Fx 68.0a1 Build Id:20190407214820 for Windows 10 x64, Ubuntu 18.04 and macOS 10.13.
I can confirm this issue is fixed on Nightly.

Comment on attachment 9051661 [details]
Bug 1534219 - Only clear globally blocked permission on navigation. r=johannh

P1 regression verified by QA on Nightly, uplift approved for 67 beta 10, thanks.

https://hg.mozilla.org/releases/mozilla-beta/rev/4ec045b28ecc

Hello,

I verified and can confirm that this issue is fixed on Fx 67.0b10 on Windows 10 x64, Ubuntu 18.04 and macOS 10.13.