How to block loading https server resource on http pages in Firefox?

I wish to block loading of https resources in Firefox on pages that are served via http protocol.

Think of these elements to be blocked/filtered:

img src="https://*"
script src="https://*"
iframe src="https://*"
frame src="https://*"

I could imagine writing an Adblock Plus "Ad Blocking Rule"/filter that blocks all these request only on http protocol pages.

How to block loading mixed content in Firefox?

Pro Backup

Posted 2013-01-23T21:13:24.903

Reputation: 457

2Have you made any attempts to write this filter rule, other than just the list you provided? If so, what have you tried and where did they fail? – techturtle – 2013-01-23T21:23:20.143

Don't know how to limit the filter to http:// sites/domains/served pages. – Pro Backup – 2013-01-23T21:28:06.760

Adblock Plus has an active forum with a section specifically for filter rule writing: https://adblockplus.org/forum/viewforum.php?f=2 Have you asked there too?

– K.A.Monica – 2013-01-23T22:43:19.640

@K.A. The forum thread Blocking HTTP content when using HTTPS is most relevant. The ABP developer confirms that "blocking mixed content is generally a bad idea".

– Pro Backup – 2013-01-23T22:58:13.593

Answers

Since Firefox version 18 you don't need an extension to block mixed content on https sites.

Enable mixed content blocking in about:config, by setting these two values to true:

security.mixed_content.block_active_content
security.mixed_content.block_display_content

Source: http://techdows.com/2012/11/make-firefox-18-beta-to-block-mixed-content-on-https-websites.html

Pro Backup

Posted 2013-01-23T21:13:24.903

Reputation: 457

Create a "user defined" NoScript Firefox extension rule in the Application Boundary Enforcer (Options > Advanced > ABE) section like:

Site http:
Deny INC from https:

Site https:
Deny INC from http:

Pro Backup

Posted 2013-01-23T21:13:24.903

Reputation: 457