Build Identifier: http://hg.mozilla.org/mozilla-central/rev/5976b9c673f8 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130715 Firefox/25.0 ID:20130715211256 Steps to Reproduce: 1. Open testcase 2. Right click on "aaaaa" and Choose "Inspect Element" 3. Disable "color" CSS rules of .aaaaa in Rule view Regression window(m-c) Good: http://hg.mozilla.org/mozilla-central/rev/1b7103181091 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20121130 Firefox/20.0 ID:20121130020812 Bad: http://hg.mozilla.org/mozilla-central/rev/d2fbc67f69f5 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20121130 Firefox/20.0 ID:20121130055213 Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=1b7103181091&tochange=d2fbc67f69f5 Regressed By: c77b869c2025 Joe Walker — Bug 788977 - [toolbox] Land the developer tools window; r=harth,jwalker,mikeratcliffe,paul,dão 4. Click another element(such as <p>) in Markup view 5. Inspect "aaaaa" again 6. Attempt to re-enable "color" CSS rules which was disabled in step3 --- No way to re-enable CSS rules because no rule of "color" here

Oops Steps to Reproduce: 1. Open testcase 2. Right click on "aaaaa" and Choose "Inspect Element" 3. Disable "color" CSS rules of .aaaaa in Rule view 4. Click another element(such as <p>) in Markup view 5. Inspect "aaaaa" again 6. Attempt to re-enable "color" CSS rules which was disabled in step3 --- No way to re-enable CSS rules because no rule of "color" here

Sorry spam