DeveloperEdition: previously loaded tab does not show content if other tab processes pdf or heavy html




2 years ago
2 years ago


(Reporter: mozilla, Unassigned, NeedInfo)


49 Branch

Firefox Tracking Flags

(Not tracked)




2 years ago
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:49.0) Gecko/20100101 Firefox/49.0
Build ID: 20160715064235

Steps to reproduce:

I could not reproduce it on will, but scenario where it often happened:
Slow internet connection
Many (~8) tabs open
Open a heavy pdf or a big website where it slowly loads all content but does not show it yet but a loading icon in the middle of the page
Get back to a previously loaded tab.

Actual results:

In the previously / already loaded tab it also shows a loading icon in the middle of the page instead of the contents from cache. When the new tab finished loading shortly after the previously loaded tab will also show it's contents.

Expected results:

Directly show contents.

Comment 1

2 years ago
Could you give us the websites you tried it on?

Comment 2

2 years ago
I tried to reproduce it with a nodejs script, which I run locally and then open another page but with this approach tab loading worked fine:

const http = require('http');
const https = require('https');
const express = require("express");
const app = express();

app.get('/test.html', function (request, response) {
	var id = setInterval(function() {
	}, 10);
	setTimeout(function() {
		response.end(' World!');
	}, 20000);

var server = http.createServer(app).listen(8889, function () {
	var host = server.address().address;
	var port = server.address().port;

	console.log('Server listening at ', host, port);
	console.log('CTRL + C to shutdown.');

I don't quite get if this is still a bug or not?
If yes please provide an example which you used for reproducing this issue.
Can you please test again in safe mode?
Flags: needinfo?(mozilla)
Marking this as Resolved: Incomplete due to the lack of response from the reporter.
If the issue is still reproducible with the latest Firefox version, feel free to reopen the bug with more information.
Last Resolved: 2 years ago
Resolution: --- → INCOMPLETE

Comment 5

2 years ago
Hi, the bug still occurs but very, very occasionally. I will not be able to reproduce this bug on will and therefore recommend to close the report?
Hi Valoric,

This issue is already closed, see comment 4.
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