port disconnect in MV3

[shenghuowang]

Describe the bug
when website connect to a chrome extension(use MV3),port disconnect after several minutes

To Reproduce
Steps to reproduce the behavior:

1. create a chrome extension use MV3, code as follow；
   chrome.runtime.onConnectExternal.addListener((port) => {

        port.onMessage.addListener((msg) => {
          // handle msg
        });
        port.onDisconnect.addListener(() => {
            //handle disconnect
        });
    });
   

2. add extension in chrome browser

3. in my website, connet to this extension, code as follow:
   let port = chrome.runtime.connect(extensionId, { name: id });
   this.port.onMessage.addListener((msg) => {
   // handle msg
   });
   port.onDisconnect.addListener(() => {
   // handle disconnect
   });

4. See error
   after several minutes(about 5-6 minutes),my website receive port disconnect

Expected behavior
port not disconnect, keep live connection

Additional context
when extension change to MV2, this bug not happen, it seems to be a bug in MV3

[robdodson]

@shenghuowang is this related to a specific doc on developer.chrome.com? If not, it might be better to ask this on https://stackoverflow.com/

[tophf]

Service workers in Chrome auto-disconnect any external connections such as extension ports after five minutes forcibly. This is a breaking change for thousands of extensions so it must be mentioned in the documentation. Ideally, though, this timer should not apply to extensions at all.

Edit: this is mentioned in https://bugs.chromium.org/p/chromium/issues/detail?id=1146434

[dotproto]

Closing as this is a Chromium issue (1146434), not a documentation bug.

[ShaoboLiu]

The same issue happened in my project of MV3.

runtime.connect successfully, and postMessage a few times successfully. However, after 5 minutes, onDisconnect event triggered. Looks like automatically lost connection. I don't know what is the reason.

[qhkm]

I'm having this issue right now with my chrome extension. Would appreciate an update on the issue I am experiencing. Thank you.