What is this unreponsive script?

Viruses and worms
1

When I watch the avast webforum page with Flock (browser is going to be discontinued next week), I get this alert:
A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.

Script: chrome://web-exposed/content/weWorker.js:589

What is this script?

polonus

2

Hi folks,

As far as I am aware it has to do with the profile and one of the extensions installed. Will have to abandon the browser anyway, which is a pity really, but alas, Flock is discontinued,

polonus