[Bug]: User avatars/images not loading if tab is started in background

[Mikaka27]

Steps to reproduce

1. Go to wykop.pl (polish equivalent of reddit.com)
2. Scroll to some link
3. Hold finger on it
4. Open it in new tab
5. Wait a few seconds on current tab
6. Switch to new tab

Expected behaviour

User avatars and images in comments are not loaded (ads are excluded from this behaviour)

Actual behaviour

See video:
https://www.dropbox.com/s/ulpwtswj7965r4c/2020_12_13_19_09_19.mp4?dl=0

I move a finger on the left of "saviola7" user where avatar should be visible. After I reload the page (and I stay on tab until it reloads), everything is fine.
I saw this problem on fenix preview, it's not happening on fennec android.
Desktop firefox is also fine, no issue there.

Device name

Samsung Galaxy S10e

Android version

Android 12

Firefox release type

Firefox

Firefox version

102.2.0

Device logs

Not a crash

Additional information

This is a reopen of #17009 since it's still happening.

┆Issue is synchronized with this Jira Task

[SoftVision-LorandJanos]

Hi @Mikaka27. Thanks for your report!
I was able to reproduce your issue with the latest Nightly 104.0a1 (2022-07-11T17...) build.
Device used: Google Pixel 4 (Android 12).

[stale]

See: #17373 This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Mikaka27]

Still an issue

[Mikaka27]

Website's layout was changed and the issue is no longer reproducible