[XLIFF Watcher] XLIFF Watcher cannot access the local http server

[t2ym]

[XLIFF Watcher] XLIFF Watcher cannot access the local http server.

Browser	Protocol	Reproducible
Chrome 59	https	-
Firefox 54	https	✔︎
Chrome 59	http	✔︎
Firefox 54	http	-
Old Chrome	https	-
Old Chrome	http	-

• Chrome https requests:
  OPTIONS:

Access-Control-Request-Headers:if-modified-since
Access-Control-Request-Method:GET

• Chrome http request does not have OPTIONS method. No Access-Control-Request-Headers/Method headers.
• Firefox http request:
  OPTIONS:

Access-Control-Request-Method	"GET"
Access-Control-Request-Headers	"if-modified-since"

• Firefox https request does not have OPTIONS method. No Access-Control-Request-Headers/Method headers.

[t2ym]

Fix for Chrome

Use https protocol even for http web applications.

[t2ym]

Since there are no good workarounds for Firefox. The issue will be closed only with the Chrome fix.