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Page doesn't stop loading even though debugging shows it's finished




3 years ago
a year ago


(Reporter: Ray Satiro, Unassigned)


39 Branch
Windows 7

Firefox Tracking Flags

(Not tracked)



(2 attachments)



3 years ago
Created attachment 8579791 [details]

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:39.0) Gecko/20100101 Firefox/39.0
Build ID: 20150315030236

Steps to reproduce:

Go to the bug (unrelated) here:


Click on the attachment gif, then click the back mouse button, and repeat until the page appears to be waiting to finish loading.

Actual results:

The page doesn't stop loading. This issue right now in this session is reproducible. I have a fairly clean profile here that I have been using all day, however I cannot reproduce this in a just-born clean profile. In the affected profile I have no extensions and only H264 plugin.

I enabled a debugging proxy and I can see the right information is returned so I don't know why Nightly doesn't properly acknowledge the load. This happens in both e10s and non-e10s tabs.

What's very interesting is the second I turn on web developer tools (if they were not on) or turn them off (if they were on) the image will appear and the page load will complete. I tried this several dozen times at arbitrary times waiting for the page to load I would hit CTRL+SHIFT+I and the image would show. Another way to get the image to show and the page load to complete is to select another window.

I made a video showing the problem. It is confusing that there are two mouse pointers in the video and that is because the GIF image that is loaded actually has a mouse pointer in it. The actual mouse pointer in my video has a transparent yellow circle around it. The video is attached.

I will also be attaching a Fiddler capture of the session. Session #46 is the completed session that doesn't finish loading. Notice the CONNECT in session 47 and the reget in 48 when the page loads (ie the gif is shown).

Expected results:

This shouldn't happen obviously.

Comment 1

3 years ago
Created attachment 8579792 [details]
firefox nightly page doesn't stop loading.saz
Hi Ray,

I didn't managed to reproduce this issue on my end. I've tested on the latest release(43.0) and latest Nightly(46.0a1). The page completely loaded every time I opened it.

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:43.0) Gecko/20100101 Firefox/43.0
Build ID: 20151208100201

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:46.0) Gecko/20100101 Firefox/46.0
Build ID: 20151216030229

Can you please try to reproduce this on your end using the latest release(43.0) and latest Nightly(46.0a1) with a new Firefox profile (maybe safe mode activated) and provide the results? Sometimes custom settings or installed add-ons can provoke this kind of issues.

Flags: needinfo?(raysatiro)

Comment 3

2 years ago
Then and now I cannot reproduce this in a just-born profile. I tried to reproduce in my regular nightly profile today with no add-ons or plugins but was unable.

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:46.0) Gecko/20100101 Firefox/46.0
Build ID: 20151217072309
Last Resolved: 2 years ago
Flags: needinfo?(raysatiro)
Resolution: --- → WORKSFORME
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