Created attachment 8837599 [details] dropdown-list-missing.png STR: 1) Enable e10s 2) Open testcase https://bugzilla.mozilla.org/attachment.cgi?id=8837573 3) Switch to RDM Result: dropdown list is not displayed. It's displayed with e10s disabled.
Does it actually depend on RDM at all? I see the same difference between e10s on vs. e10s off outside of RDM as well.
Indeed, it's more an issue with e10s, no need of RDM.
Component: Developer Tools: Responsive Design Mode → Layout: Form Controls
Product: Firefox → Core
Summary: [e10s] <select> dropdown list is not displayed in RDM → [e10s] <select> dropdown list is not displayed
There is nothing in the drop-down list. I'm testing this on 54.0a1 (2017-02-14) and the list is empty on e10s, non-10s, and Safari windows. However, visually the empty list looks different on e10s and non-e10s windows.
A even more simplified version of test case for comment 0 is: data:text/html,<select></select> However, as there's nothing in the drop-down list, I personally would think this is a very edge case. Note, chrome behaves the same as what the current e10s behaviour. If there's something in the drop-down list, e.g. adding "option", then drop-down is displayed as expected. Considering the facts, I am going to mark this as P5 (very very low priority, but will accept a patch). Astely, feel free to change it if you have different opinions.
Priority: -- → P5
Summary: [e10s] <select> dropdown list is not displayed → [e10s] <select> dropdown list is not displayed when there's nothing in the list
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