STRs: - go to any page - open the inspector - find a property with color swatch - click on the color swatch - click on the eyedropper - pick any color on the page - try to update the color using the color picker gradient ER: Value should update as we move the cursor on the gradient AR: Value only updates once This behavior remains every time you re-open the color picker.

Comment on attachment 8876613 [details] Bug 1365053 - called `_onEyeDropperDone` once the color is selected; https://reviewboard.mozilla.org/r/147940/#review152426 The fix looks good. I wanted to check if a test would be easy to add, but for some reason, mochitests don't seem to work for me locally. Did you try to add a small test based on devtools/client/inspector/rules/test/browser_rules_eyedropper.js ? Could be nice to have non regression here :)

Matteo, can you please land this :)

Added 2 ok() checks for eyedropperOpen and activeSwatch in browser_rules_eyedropper.js. Will also land this.

Pushed by gabriel.luong@gmail.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/71f4f2c0ec56 called `_onEyeDropperDone` once the color is selected; r=jdescottes

I have reproduced this bug according to (2017-09-12) Fixing bug is verified on Latest Nightly & Latest Beta-- Build ID :20170923220337 User Agent :Mozilla/5.0 (Windows NT 6.1; rv:58.0) Gecko/20100101 Firefox/58.0 Latest Beta-- Build ID :20170918210324 User Agent :Mozilla/5.0 (Windows NT 6.1; rv:56.0) Gecko/20100101 Firefox/56.0 Tested OS-- Windows7 32bit