2033509 - autocomplete / datalist doesn't work in an options page embedded in the add-ons manager (about:addons)

Status: RESOLVED DUPLICATE of bug 1595158

(WebExtensions :: Frontend, defect)

Description

[Vincent Hilla [:vhilla]]

Attachment: testcase.zip

Bascially, autocomplete doesn't work for this embedded addon-inline-options browser in about:addons.

STR

• Install the addon in testcase.zip
• Go to about:addons, testcase, preferences
• Click show picker or focus the input and press key arrow down

I think this is basically bug 1387624. I was worried a change from mine regresses this, so I looked a bit further. AutoCompleteParent.sys.mjs receiveMessage has browser.autoCompletePopup being null. The browser element does have autocompletepopup=PopupAutoComplete set, which browser-custom-element.mjs uses to get the respective element by id. But the element doesn't exist.