[Affected versions]: - latest Nightly 54.0a1 - latest Aurora 53.0a2 [Affected platforms]: - Windows 7 x64 - Windows 8.1 x64 - macOS 10.12.1 [Steps to reproduce]: 1. Start Firefox. 2. Enable Compact Light theme from about:addons. - inspect the tab border color [Expected result]: - The tab border has a dark color, same like Dev edition theme had, before it became Compact Theme. (see the screenshot attached) [Actual result]: - The tab border has a grey color. [Regression range]: - https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=fb6a2290e35d17db060dfe3c541ca04f3a6f9230&tochange=4bbe0c7e648909d6118e9cc4eea14296569db80b [Additional notes]: - I can only see this issue with Compact Light theme - this is not reproducible on Windows 10 and Ubuntu LTS

This is a polish issue, P3. Aside: is it me or does it look better now? Is this an intentional change?

(In reply to Jeff Griffiths (:canuckistani) (:⚡︎) from comment #1) > This is a polish issue, P3. > > Aside: is it me or does it look better now? Is this an intentional change? I think it looks worse, the non-transparent grey clashes with the darker border at the edge (on the left side of window). That said, I think this is win8-specific, so meh.

Dao, is this likely to be fixed for 54?

(In reply to Nathan Froyd [:froydnj] from comment #3) > Dao, is this likely to be fixed for 54? Probably easy to fix, but so far nobody has looked into this and it's unlikely to become a priority, since things will change again in Firefox 57.

That's unfortunate, but that's also life. Marking fix-optional, then.

Is this still relevant ?

No, the issue is not reproducible anymore on latest Nightly.

Resolving per comment #7.