Steps to Reproduce: 1. Start Nightly 2. Open new container tab (e.g. Personal, identity color is blue) 3. Go to about:preferences#containers 4. Change identity color from blue to yellow Actual Results: Cannot reflect usercontext identity color immediately at existing tab even if changing identity color. Actual Results: Reflect usercontext identity color immediately.

I ran into this several times as well. It looks like the colour/indicators are correctly being changed under the awesome bar, but the tab highlights are not immediately being changed. If you move the tab into it's own separate window, the colour does end up changing. Platforms: * macOS 10.12.1 -> affected * Ubuntu 16.04.1 LTS -> affected * Win 10 x64 -> affected

Comment on attachment 8817196 [details] [diff] [review] color.patch Review of attachment 8817196 [details] [diff] [review]: ----------------------------------------------------------------- r=me Can you file a followup to switch to weak ref observers?

Pushed by amarchesini@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/2ff0d7460eb6 Propagate contextual-identity-updated notification when an ContextualIdentity is modified, r=gijs

I have reproduced this bug with Nightly 52.0a1 (2016-11-13) on Windows 8.1 , 64 Bit ! Build ID 20161113030203 User Agent Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0 This bug's fix is Verified with latest Nightly ! Build ID 20161208075029 User Agent Mozilla/5.0 (Windows NT 6.3; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0 [bugday-20161207]