I am writing a WebExtension to communicate with a server using XMLHttpRequest.
I load this WebExtension temporarily by about:debugging. It works well if I do not login into my Firefox account. It can get data from the server.
But after logining into my account, it returns “xmlhttp.status: 0” immediately when I trying to do the same thing.
Then I removed all my add-ons, but still I have this problem. I have to refresh Firefox to make my add-on work again.
Any suggestions will be appreciated.