1236072 - [e10s] With e10s enabled, arrow keys don't change the selected option, in a open <select> dropdown menu

Status: RESOLVED DUPLICATE of bug 1195200

(Core :: Widget, defect)

Description

[Daniel Holbert [:dholbert]]

Attachment: testcase 1

STR:
 1. Load attached testcase (or any page with a <select> menu)
 2. Click the dropdown menu to open it. Don't move your mouse.
 3. Use uparrow/downarrow keys on your keyboard to change the selection.
 4. Click the dropdown menu again to close it.

EXPECTED RESULTS:
* In step 3, the choice that's displayed on the <select> should be changed when I highlight a different option with arrow keys.
* After step 4, my final highlighted option should be chosen.

ACTUAL RESULTS (with e10s enabled):
* In step 3, the choice that's displayed on the <select> *does not change*.
* After step 4, the choice that's displayed on the <select> has not changed. (It's not what I picked.)

I get EXPECTED RESULTS in Chrome and in Firefox 43 (release) and in Firefox Nightly with e10s disabled.
I get ACTUAL RESULTS in Firefox Nightly with e10s enabled.

I'm using Nightly 46.0a1 (2015-12-31).

(FWIW, I frequently perform something like the STR here when adjusting form fields on bugzilla, so I run into this frequently. I've had e10s disabled for a while, though, and I'm only now trying Nightly with it on again. Apologies if this is a dupe of an existing bug.)

Comment 1

[Daniel Holbert [:dholbert]]

Hmm, I think this may be a dupe of bug 1195200.

Comment 2

[Daniel Holbert [:dholbert]]

Yeah, duping, since click-on-menu-to-close-it (this bug here's STR) is basically the same as click-outside-menu-to-close it ( bug 1195200's STR), and both bugs involve choosing a menu-item using the keyboard (whether via alpha keys or uparrow/downarrow keys).