Open Bug 1473163 Opened Last year Updated 6 months ago
devtools inspector not responding while loading external assets on slow connections
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36 Steps to reproduce: Make a simple valid html file that loads various assets from external domains, for example 5 different libraries from googleapis.com. Set network throttling in Firefox Devtools to slow network / grps connection. Open the devtools Inspector, load/hard-refresh the page. Try to select elements on the page. I made a screencast to demonstrate the issue: https://youtu.be/Iak8tYnG0ZI Actual results: The devtools inspector won't select elements on the page until all the external assets have been loaded. Expected results: I would expect the devtools inspector to select elements on the age, while it is loading external assets. Google Chrome 67.0.3396.99 works the way I expect.
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:63.0) Gecko/20100101 Firefox/63.0 Build ID: 20180705220111 I manage to reproduce this issue on Mac 10.13 with Firefox Nightly 63.0a1 (2018-07-06) (64-bit). Please note that this issue is also displayed on Windows 10 x64.
Hey Alex, I seem to remember you working not long ago on making the inspector start to show things before the load event. Can you remind me the state of things here?
I had work in progress patches in bug 1277348 to tweak that: immediately load the inspector and update the markup-view instead of waiting for DOMContentLoaded. Unfortunately I dropped the ball here as I got stuck on mochitest leaks. Note that the simple switch to DOMContendLoaded instead of load already introduced a couple of regression, I'm expecting this new change to bring even more subtle issues. See bug 1151909 dependent bugs.
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