1810370 - Focus gives a "running in the background" notification in Task Switcher and uses lots of CPU in background

Status: NEW

(Focus :: General, defect)

Description

[Mark]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/110.0

Steps to reproduce:

See https://github.com/mozilla-mobile/fenix/issues/28452#issuecomment-1382712532

As soon as Focus has any tab loaded, OneUI 5 shows a “1 active in background” warning in the task switcher which I don’t see for any other app. Tapping the warning says “Check background activity. These apps and services are active while running in the background: Firefox Focus". adb shell top shows Focus using significant CPU even when in the background.

Galaxy M32, OneUI 5.0, Android 13, Focus 109.1.1

Actual results:

Focus seems to run in the background, unusual for an Android app, I've not seen this warning before.

Expected results:

Focus shouldn't run in the background?

Comment 1

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

The severity field is not set for this bug.
:cpeterson, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 2

[Denis Palmeiro [:denispal]]

The Performance Impact Calculator has determined this bug's performance impact to be low. If you'd like to request re-triage, you can reset the Performance Impact flag to "?" or needinfo the triage sheriff.

Platforms: Android
Configuration: Rare
Page load impact: Severe
Websites affected: Rare
[x] Causes severe resource usage