1935863 - online/offline events and navigator.onLine not working in webextension

Status: RESOLVED DUPLICATE of bug 1421393

(WebExtensions :: Untriaged, defect)

Description

[kernp25]

Attachment: manifest.zip

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0

Steps to reproduce:

1. Install extension
2. Disconnect internet (to go offline)
3. Watch console
4. Connect with the internet again (to go online)
5. Watch console

Actual results:

No online/offline events are fired. Navigator.onLine always shows true even if the internet is disconnected.

Expected results:

Should work like in Google Chrome.

Comment 1

[kernp25]

Can you repro and set this bug to NEW?
Maybe you know also how to fix this?

Comment 2

[kernp25]

It seems that navigator.onLine is also not working here in the developer console (not only in a webextension).

Comment 3

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

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

Comment 4

[Alex Cornestean]

Hello,

I reproduced the issue on the latest Nightly (135.0a1/20241208214455), Beta (134.0b7/20241206102218) and Release (133.0/20241121140525) under Windows 10 and Ubuntu 24.04 LTS.

With the extensions loaded in the browser via about:debugging, disabling and re-enabling the internet connection does not fire any online/offline events. Neither the add-on console nor the browser console show anything related to this.

Comment 5

[Tomislav Jovanovic :zombie]

(In reply to kernp25 from comment #2)

It seems that navigator.onLine is also not working here in the developer console (not only in a webextension).

Can you please try to repro in a plain web page?

Comment 6

[Rob Wu [:robwu]]

The implementation of navigator.onLine (source) behaves identical for web pages and extension contexts. Your observation is probably not extension-specific.

I see an existing bug report for Windows specifically about navigator.onLine continuing to return true (bug 1421393).

Comment 7

[kernp25]

I did not see bug 1421393. This is a duplicate then.