You might notice Opera actually did not allow user script to run on secure page (page with https address) by default, but we need this in order to run user script on our game in Facebook which now can be run on a secure connection or https.

The fix is simple, simply open the given link “opera:config#UserPrefs|UserJavaScriptonHTTPS“, tick User JavaScript on HTTPS and remember to click Save (at the bottom)!

You will need to restart your Opera browser to make it work (simply close and re-open back the Opera browser). You should see the dialog box below. just click Yes and you can now execute user script on https.

by Ooi Keng Siang via Ooiks’s Blog