Cosmin Muntean [:cmuntean], Ecosystem QA (PTO until September 8th) Reporter
	Description • 6 years ago

[Affected versions]:
- Firefox 62.0a1 (BuildId: 20180618220118)
- Firefox 61.0b14 (BuildId: 20180614135649)

[Affected platforms]:
- All Windows
- All Mac
- All Linux

[Prerequisites]:
- Have a new clean Firefox profile.
- The "Accessibility" option is checked in "Toolbar Options".
- The Firefox browser is maximized.

[Steps to reproduce]:
1. Start the Firefox browser with the profile from prerequisites and navigate to "https://www.youtube.com/".
2. Press the "F12" key and enable Accessibility features.
3. Right click on any element from the left menu of the page.
4. Click the Inspect Accessibility Properties and don't move the mouse. 
5. Observe the Accessibility panel.
6. Move the mouse out of the iframe and observe the Accessibility panel.
 
[Expected result]:
Step 5: The document tree is correctly extended and the inspected element is focused.
Step 6: The inspected element remains focus.

[Actual result]:
Step 5: The document tree is correctly extended and the inspected element is focused.
Step 6: The tree is shrank. 

[Notes]:
- Attached a screen recording with the issue.

	Cosmin Muntean [:cmuntean], Ecosystem QA (PTO until September 8th) Reporter
	Comment 1 • 6 years ago

I have noticed a similar behavior if you investigate a thumbnail video from the Youtube page when the Web Developer Tool is closed. Attached a a screen recording with the described behavior.

Should I log a separate issue for this?