1571614 - Miss-synchronization of the zoom level at an inline options page and the addon manager page

Status: RESOLVED DUPLICATE of bug 1398481

(WebExtensions :: General, defect)

Description

[YUKI "Piro" Hiroshi]

Attachment: Screenshot of miss-synchronized zoom level example

When an options page of an extension is shown inside the about:addons UI, its zoom level is not synchronized to the about:addons page itself on certain cases.

Steps to reproduce

1. Install an add-on providing options page inside the add-on manager. I've tested with Tree Style Tab and Simple Tab Groups.
2. Go to about:addons, and show the options page of the add-on.
3. Hit Ctrl-+ multiple times.
4. Hit Ctrl-- multiple times, until the zoom level becomes under 100%.
5. Hit Ctrl-0 to reset the zoom level.
6. Scroll up the mouse wheel on the inline options page, with pressed Ctrl key.
7. Reload the page, and show the inline options page again.
8. Scroll up the mouse wheel on the inline options page, with pressed Ctrl key.
9. Hit Ctrl-0 to reset the zoom level.
10. Reload the page, and show the inline options page again.
11. Scroll down the mouse wheel on the inline options page, with pressed Ctrl key, until the zoom level becomes under 100%.
12. Reload the page, and show the inline options page again.
13. Scroll down the mouse wheel on the inline options page, with pressed Ctrl key.

Actual result

• step 3:
  • the add-on manage's UI => large size
  • the inlien options page => its original size (wrong)
• step 4:
  • the add-on manage's UI => small size
  • the inlien options page => its original size (wrong)
• step 6:
  • the add-on manage's UI => large size
  • the inlien options page => large size (correct)
• step 7:
  • the add-on manage's UI => large size
  • the inlien options page => its original size (wrong)
• step 8:
  • the add-on manage's UI => more large size
  • the inlien options page => large size but smaller than the add-on manager's UI itself (wrong)
• step 11:
  • the add-on manage's UI => small size
  • the inlien options page => small size (correct)
• step 12:
  • the add-on manage's UI => small size
  • the inlien options page => its original size (wrong)
• step 13:
  • the add-on manage's UI => more small size
  • the inlien options page => small size but larger than the add-on manager's UI itself (wrong)

Expected result

On all steps both the add-on manager's UI and the inline options page are shown with same zoom level.

Environment

• Windows 10 1809 64bit
• Firefox 68.0.1 build ID: 20190717172542
• Nightly 70.0a1 build ID: 20190805220030

Comment 1

[YUKI "Piro" Hiroshi]

This was originally reported at https://github.com/piroor/treestyletab/issues/2342

Comment 2

[YUKI "Piro" Hiroshi]

This problem doesn't happen on a regular webpage including inline frames, for example: https://developer.mozilla.org/ja/docs/Web/HTML/Element/iframe