Uncaught TypeError: Cannot read property 'length' of undefined(…) contextMenus.js:946 in about:extension page

[srirambv]

• Did you search for similar issues before submitting this one?
  Yes

• Describe the issue you encountered:
  While testing Icons in about:extensions may not be 48x48 #6580 , right click on the extensions entry in about:extension shows

  Uncaught TypeError: Cannot read property 'length' of undefined(…) contextMenus.js:946

• Platform (Win7, 8, 10? macOS? Linux distro?):
  Windows 10 x64

• Brave Version (revision SHA):
  Brave 0.13.2
  rev 726b9d2

• Steps to reproduce:

  1. Do a clean install of 0.13.2 RC6
  2. Open about:extension page and open browser console
  3. Right click on the extensions entry, console shows error

• Actual result:
  Right click on the extensions entry, console shows error

• Expected result:
  Should not show error

• Will the steps above reproduce in a fresh profile? If not what other info can be added?
  Yes

• Is this an issue in the currently released version?
  Yes. Verified in 0.13.1

• Can this issue be consistently reproduced?
  Yes

• Extra QA steps:
  1.
  2.
  3.

• Screenshot if needed:
  

• Any related issues:
  Uncaught TypeError: cannot read property 'has' of undefined(...) : onKeyDown @ menubar.js:160 #7055

[NejcZdovc]

@srirambv I have a solution for it, but I am not sure what should be a result of a contextMenu. What items should be show?

Right now is something like this (after a fix), in which I don't see any real value.

[srirambv]

I don't think it needs to show context menu. We are not allowing users to open the installed folder location or do anything else. I think disabling right click on that page should be fine. @bbondy thoughts?