Chrome Web Dev Tools not showing up on Mac OXS 10.11.2

[Georg Kothmeier]

I already posted my problem on Stackoverflow (Link to thread) but I'm not sure if it is the right place. So I ask it here again.

Since some days I can not open the Chrome Developer Tools anymore. Neither the keyboard shortcut nor right-click --> inspect element works. No window opens and nothing happens. I tried the following trick: http://stackoverflow.com/a/28866632/1280401 but it does not work. I don't have a file called chrome-devtools_devtools_0.localstorage-journal. Maybe this is because I have a different problem then the thread starter of http://stackoverflow.com/a/28866632/1280401. 

When I execute the following command:

"/Applications/Google Chrome.app/Contents/MacOS/Google Chrome" --user-data-dir=/tmp/whatever

Everything works fine again. So I fear that my Chrome Profile is somehow destroyed. Is there a way to get the Chrome Dev Tools working without deleting my Chrome Profile? Deleting the profile would be the worst case. Hope someone could help me.

My Chrome Version is: 48.0.2564.116 (64-bit)

My Macbook is: OS X El Capitan 10.11.2 (15C50), MacBook Pro (Retina, 15', Mitte 2014)

[Georg Kothmeier]

I started Chrome with: 

/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --enable-logging --log-level=0

Then I got the following error message: 

Uncaught TypeError: Object.observe is not a function", source: chrome-devtools://devtools/bundled/inspector.js (10681)

After pasting this error into Google I found the following thread https://bugs.chromium.org/p/chromium/issues/detail?id=549225#.

Is this expected behavior that I can not open the dev tools when javascript-harmony-shipping is turned on? With  javascript-harmony-shipping turned off everything works as expected

[Paul Irish]

This bug has been fixed and I believe the fix is already in beta.

We no longer use Object.observe. 

I believe that O.o was removed in the `javascript-harmony-shipping` flag before it was removed from the default build. Which is a bit odd. But it was. :)

If you want to stay on stable, you'll have to keep that flag off, yes.

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[Georg Kothmeier]

@Paul Irish

Thank you for the explanation. So I'll wait for the next release :)

[José Antonio Huizar Moreno]

I just experienced the same problem with the Developer Tools not showing on V. 50.0.2661.102(64 bit) on Mac OS X El Capitan.