Unable to open chrome-extension:// pages when DevTools are open

[alyss...@gmail.com]

Crbug: https://bugs.chromium.org/p/chromium/issues/detail?id=1516380#c_ts1704980961

Sharing here for visibility / any additional info.

I found an issue when attempting to open any chrome-extension:// page with the DevTools open in any page, which prevents it from loading entirely. I've been able to reproduce this in macOS but not in Windows. 

It seems like a pretty severe issue, it affects all sorts of extensions like Loom (it's impossible to start recording, in some cases even open up the extension entirely when in a new tab page), or my own extension Screenity that has similar functionality.

Wondering if others can reproduce this issue or are aware of it?

[Deco]

I am not able to reproduce this on MacOS - the extension page loads correctly with the devtools page open, i used Loom as described in the Chrome bug report. It may be worth experimenting with some flags under chrome://flags to do with extensions to see if it's possible, it seems to be a bizarre issue however, first i've seen reported about it.

Cheers,

Deco

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[alyss...@gmail.com]

I attempted reseting flags, and toggling related extension flags to no avail. I did test this with Chrome Canary though and the issue doesn't seem to be there, only experiencing it on the latest Chrome 120 official build.

[Deco]

The only discrepancy that I can see is that you have policy management of the browser, I do not have this, are there restrictions on extension configuration set by your organisation which is why it could be failing to load?

Cheers,

Deco

[alyss...@gmail.com]

The only policies I had set were for the Extension Update Testing Tool: https://github.com/GoogleChromeLabs/extension-update-testing-tool

I've just removed all of them, reloaded them on chrome://policy, and then restarted my computer, but the issue unfortunately still persists.

[wOxxOm]

If you don't have breakpoints added in devtools -> Sources panel it sounds like a bug in devtools. Try disabling chrome://flags/#devtools-tab-target

[alyss...@gmail.com]

Don't have any breakpoints, and I've tested this in different websites with the same problem. I've just disabled the devtools-tab-target flag and restarted but sadly nothing's changed.

[wOxxOm]

In case no one else reproduces the bug it will be closed, so you may want to do a bisect yourself using https://www.chromium.org/developers/bisect-builds-py/

[Gaurang Tandon]

Thanks for sharing this issue. I had the same issue with Loom today morning, and was obviously very confused at that time.

I am now able to reproduce this issue consistently, with these steps: I opened DevTools from this Google Groups page, then I opened loom.com, then I started a recording using their New Video button, and then their chrome-extension:// tab opened, but it failed to load. Then, I closed the DevTools, and tried again: now their chrome-extension:// opened instantly. I tested with both Loom version 5.5.42 and with 5.5.43 (latest) and I found the issue in both of them.

After that, I tested this issue in a different Chrome profile. I was not able to reproduce this issue in that different Chrome profile. Neither of my profiles is policy-managed. I'm not sure yet what's the cause in this specific profile.

[Oliver Dunk]

Thanks for the troubleshooting - I tried to reproduce this but haven't been able to yet.

If either of you are comfortable bisecting, that is always helpful - but I understand if not.

Definitely keep the bug updated and I'll make sure we're keeping an eye out too.

Oliver Dunk | DevRel, Chrome Extensions | https://developer.chrome.com/ | London, GB

To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/chromium-extensions/95fb9132-ef1a-4546-b475-1046a73c01acn%40chromium.org.