Timeout when loading page in edit mode (Ckeditor) on FF/Debian

Hello,

I don’t know if this issue come from my FF (and extension) or not but when I edit page CkEditor windows are very slow to load (and frequenly I must Ctrl+F5 to edit a page in wysiwig mode). The most of case I can not open a page with wysiwig editor.
Anyway, I’m behind a proxy server and use FF ESR 52.2.0 (64 bits)/Debian stable and xwiki 8.4.4 (I tried on Tomcat server and jetty package on same machine)

First firebug show me this:

http://requirejs.org/docs/errors.html#timeout

(it is strange because I can load http://localhost:8080/xwiki/webjars/wiki%3Axwiki/requirejs/2.2.0/require.min.js?r=1 and IMO xwiki musn’t try to load JS from internet)

Second, some CSS and js aren’t loading from server but the cache:
Here a firebux screenshot: Upload and share screenshots and images - print screen online | Snipboard.io

I can use http://ckeditor.com/ without problem.
With Chromium Version 59.0.3071.86 I haven’t problem

If someone encoutered same problem ?
Probably my FF conf is little bit messy (I will remove some extension to test)

ty

Pascal B

OK I removed “It’s all text” FF extension, my xwiki editing page working well now…
I must removed it because disabled it was not enough :confused:
Maybe a warning here is needed?