Iulia Cristescu, QA [:JuliaC] (away, please needinfo? cornel.ionce@softvision.ro) Reporter
	Description • 6 years ago

[Affected versions]:
- 62.0a1 (2018-06-13)
- 61.0b13 build1 (20180611134439) 
- 60.0.2 build1 (20180605171542)

[Affected platforms]:
- Windows 10 x64
- Ubuntu 16.04 x64
- macOS 10.10.5

[Steps to reproduce]:
1. Launch Firefox 
2. Open a random page and launch the Inspector 
3. Go to about:config and make sure that devtools.inspector.three-pane-enabled and devtools.inspector.three-pane-toggle prefs are set to true 
4. Reopen the Inspector on a random page and notice each panel's width 

[Expected result]:
- [step4] The 3-pane inspector widths are properly adjusted

[Actual result]:
- [step4] The HTML Inspector, the CSS rules section and the side section have the same width since the first opening (for more details, see the following screencast https://drive.google.com/file/d/1q5blp25LX1WO4n1E4rsT8Xbd8ccrihTW/view?usp=sharing)

[Regression range]:
- This issue is reproducible all the way back to 59.0a1 (2017-12-08) (when bug 1369945 was fixed)

[Additional notes]:
- The behaviour gets normal after toggling the split view
- On older versions of Firefox (60 and 59), the widths are not calibrated after toggling the split view
- Firefox 62 has the 3-pane inspector enabled by default, but the issue can be reproduced if firstly disabling it

	Patrick Brosset <:pbro>
	Comment 2 • 6 years ago
mozreview-review

Comment on attachment 8985933 [details]
Bug 1468495 - Reset the inspector widths for the first run of 3 pane inspector.

https://reviewboard.mozilla.org/r/251414/#review257918

	Pulsebot
	Comment 3 • 6 years ago

Pushed by gabriel.luong@gmail.com:
https://hg.mozilla.org/integration/mozilla-inbound/rev/130fd3919bd9
Reset the inspector widths for the first run of 3 pane inspector. r=pbro

	Dorel Luca [:dluca]
	Comment 4 • 6 years ago
bugherder

https://hg.mozilla.org/mozilla-central/rev/130fd3919bd9

	Rares Doghi, Desktop QA
	Comment 5 • 5 years ago

Hi, I can Confirm this issue as Fixed in Nightly 66.0a1 (2018-12-19) Beta 65.0b2 and Release 64.0, I will mark this issue Accordingly.