Context menus disappear

[chunibyocola]

In Chrome91~92, context menus will disappear in some case.

[chunibyocola]

This issue can be caused by the follow steps:

1. Allow this extension in incognito mode.
2. Open a new incognito page.
3. Context menus disappear.

It is not a issue in other extensions.
I will figure out a way to fix this bug.

[chunibyocola]

This bug caused by chrome.contextMenus.removeAll().

Seems like in incognito mode, the context menus are created after chrome.contextMenus.removeAll() will not work in the normal mode. But the chrome.contextMenus.removeAll() in incognito mode will remove normal mode's context menus.

This doesn't make sense. It might be a Chromium bug here.

To keep the same experience as before, I fixed it through duplicate create/remove. There is a better way to fix it by contextMenu.visible, but there will be a wrapper even if there is only a single menu. Will be switch to "contextMenu.visible" if the "duplicate create/remove" cause bugs.