1287780 - Dotted focus outline around 'Visit MDN page' link is not displayed at a first attempt

Status: NEW

(DevTools :: Inspector: Rules, defect, P3)

Description

[Ada [:adalucinet]]

[Note]: 
-logged as a followup from bug 1287464

[Affected versions]:
- latest Nightly 50.0a1

[Affected platforms]:
- Ubuntu 16.04 64-bit
- Mac OS X 10.11.1

[Steps to reproduce]:
1. Launch Firefox
2. Open Inspector: Ctrl + Shift + C (for Ubuntu) or Cmd + Opt + C (for Mac OS X)
3. Right click on any property name via the Ruleview
4. Select 'Show MDN Docs' option from the context menu

[Expected result]: A dotted focus outline is displayed around 'Visit MDN page' link.

[Actual result]: A dotted focus outline is not displayed around 'Visit MDN page' link.

[Regression range]:
- Not a regression - the dotted outline on this specific element was introduced by bug 1283454, but is not consistent → it's visible starting with the 2nd attempt (aka repeating step 4).

[Additional notes]:
- Screen recording: https://goo.gl/VwHT95