Hello everybody ! 
Everything is in the title 
Need more details anyway ? OK. I just created a new Aurelia application from scratch, nothing added after the au new.
I then run it with au run --watch, and here what I find in the web console:
Then, I cried 
Ok, maybe I exagerate a bit 
Does someone have some insight about this ? Thanks !
Cannot reproduce.
There is no “receivePageEvent” in any source code of aurelia core libs. What is your content_script.js? I don’t think bare “au new” gave you that file.
It could be error from one of your chrome plugins.
Yea it is a chrome extension for sure.
Yeah, indeed you re both right, sorry for the false alarm 
When I clicked on the content_script.js:10 and scrolled up to the top of the script, I saw a comment indicating that it was part of the SideWise extension 
Thanks again for the really quick answer, and sorry for not diving deep enough before posting here ! 
I do not know how to close this request. If someone does, I’ll gladly do it