1926657 - Additional Tabs not loading in background while working on an existing tab

Status: UNCONFIRMED

(Core :: Performance, defect)

Description

[luisalvaradox]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0

Steps to reproduce:

If I open my whereby account, for example https://whereby.com/myAccountURL with a middle click or simply force it to open in another tab, but I do NOT visit that new tab, instead I stay on the current one. On Google Chrome the new tab ends up loading without problems. Here on Firefox it basically freezes the loading process until I actually click on the new tab, forcing me to have to go to the other tab and wait till it loads and then I can continue working on my previous tab.

I do it like this because when am meeting with my development team I simply open the tab and am ready. Now I am forced to open the tab, go to it, stay there and wait till the page loads, and then go back to the previous tab I was in.

Actual results:

The new tabs do not load in the background. Like the web workers or any other technology in whereby.com is not letting the tab load till I have that tab active.

Expected results:

It should load in the background when opened, without me having to go to that new tab. if I open a link in a new tab it should simply open.

I do have the following config settings in TRUE

browser.search.context.loadInBackground true
browser.tabs.loadInBackground true
services.sync.prefs.sync.browser.tabs.loadInBackground true

And I have checked others to make sure they are true:

browser.search.context.loadInBackground true
browser.tabs.loadBookmarksInBackground true
browser.tabs.loadDivertedInBackground true
dom.timeout.background_budget_regeneration_rate 1000
dom.timeout.background_throttling_max_budget 1500
dom.workers.background_throttling false

I am using the SNAP version of Firefox on Ubuntu 24.10

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Performance' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

This bug was moved into the Performance component.

:luisalvaradox, could you make sure the following information is on this bug?

• For slowness or high CPU usage, capture a profile with http://profiler.firefox.com/, upload it and share the link here.
• For memory usage issues, capture a memory dump from about:memory and attach it to this bug.
• Troubleshooting information: Go to about:support, click "Copy raw data to clipboard", paste it into a file, save it, and attach the file here.

If the requested information is already in the bug, please confirm it is recent.

Thank you.

Comment 3

[luisalvaradox]

Attachment: firefoxDebug.txt