User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:44.0) Gecko/20100101 Firefox/44.0 Build ID: 20151008030232 Steps to reproduce: I have a userChrome.css in aurora that has some css to change the background color of urlbar to yellow for https: #urlbar[level] { background-color: rgb(255,255,204) !important; } Actual results: Nothing in the most recent aurora nightlies. mozregression results: mozregression --repo mozilla-aurora --bits 32 --profile-persistence clone-first 11:17.46 LOG: MainThread Bisector INFO Narrowed nightly regression window from [2015-10-06, 2015-10-08] (2 days) to [2015-10-06, 2015-10-07] (1 days) (~0 steps left) 11:17.46 LOG: MainThread main INFO Got as far as we can go bisecting nightlies... 11:17.46 LOG: MainThread Bisector INFO Last good revision: 7921dfde86c7355b614385c06d2d3cadf8c1da82 11:17.46 LOG: MainThread Bisector INFO First bad revision: ef920d4dd41c3e1554429fbe362d169d7592a291 11:17.46 LOG: MainThread Bisector INFO Pushlog: https://hg.mozilla.org/releases/mozilla-aurora/pushloghtml?fromchange=7921dfde86c7355b614385c06d2d3cadf8c1da82&tochange=ef920d4dd41c3e1554429fbe362d169d7592a291 11:17.46 LOG: MainThread main INFO Can not bisect inbound for application `firefox` because the repo `mozilla-aurora` was specified. Expected results: The background color is supposed to change to yellow for https.

The level attribute has been removed in bug 1204486. It didn't properly reflect the security / identity states we want to communicate to users. What's even worse, the CSS you've been using didn't take into account level="broken".