<menuitem> will be disabled in Firefox v85

[tgn-ff]

See Bug 1680596. I noticed it on Nightly due to the disabled scripts not being faded anymore.

[StigNygaard]

See #3078

[arantius]

I see it still working in 85.0b9 .

[tgn-ff]

dom.menuitem.enabled defaults to false in 85.0b9 on my end.

[arantius]

Did a fresh install of Nightly and

I see the menu command polyfill still work fine, in 86.0a1.

The "disabled scripts not greyed out" issue, I do see. I'm confused about whether that's relevant to this change or not. Rivets/tinybind is just not setting the "disabled" attribute, and this persists even if I change <menuitem>s to <div>s.

[StigNygaard]

@arantius I don't understand your screenshot. What are you trying to show? The "Take a Screenshot" item is not created from html5 <menuitem>, it's a standard feature of Firefox. Isn't it?
Also the html5 menuitems is/was placed in top of context-menu. You can use webextension API though to add items in bottom of contextmenu.

Or am I totally misunderstanding what you are trying to show?

[arantius]

I was confused. (The GM.rmc command I use most often is from the "Search with Google" script, because Google is not the default engine in my main profile. In this test profile I installed it and thought I saw it run and create a menu item. Nope, that's the standard (Google is the default by default!) search context item.)

Install https://gist.github.com/arantius/10f7a8c998c2d06d84b8f9dad48b3f92 in Firefox stable (84) and you see a context item:

Install it in Nightly (86), nothing. Report confirmed.

[arantius]

And now that I finally understand: This is a dupe of #3078, just a stronger reason to proceed there.