Users can toggle this setting by clicking the lock icon on any page and clicking Site Settings. This setting will apply to mixed scripts, iframes, and other types of content that Chrome currently blocks by default.

In Chrome 79, releasing to stable channel in December 2019, we’ll introduce a new setting to unblock mixed content on specific sites.

Instead of blocking all mixed content all at once, we’ll be rolling out this change in a series of steps. To minimize breakage, we will autoupgrade mixed resources to so sites will continue to work if their subresources are already available over Users will be able to enable a setting to opt out of mixed content blocking on particular websites, and below we’ll describe the resources available to developers to help them find and fix mixed content. In a series of steps starting in Chrome 79, Chrome will gradually move to blocking all mixed content by default. Loading mixed content also leads to a confusing browser security UX, where the page is presented as neither secure nor insecure but somewhere in between. For example, an attacker could tamper with a mixed image of a stock chart to mislead investors, or inject a tracking cookie into a mixed resource load. HTTPS pages commonly suffer from a problem called mixed content, where subresources on the page are loaded insecurely over Browsers block many types of mixed content by default, like scripts and iframes, but images, audio, and video are still allowed to load, which threatens users’ privacy and security. We’re now turning our attention to making sure that HTTPS configurations across the web are secure and up-to-date.

In the past several years, the web has made great progress in transitioning to HTTPS: Chrome users now spend over 90% of their browsing time on HTTPS on all major platforms. This change will improve user privacy and security on the web, and present a clearer browser security UX to users.

In a series of steps outlined below, we’ll start blocking mixed content (insecure subresources on pages) by default. Today we’re announcing that Chrome will gradually start ensuring that pages can only load secure subresources. Check the Chrome Platform Status entry for the latest information about when mixed images will be autoupgraded and blocked if they fail to load over Sites with mixed images will continue to trigger the “Not Secure” warning. Update (): Mixed image autoupgrading was originally scheduled for Chrome 81, but will be delayed until at least Chrome 84.

Posted by Emily Stark and Carlos Joan Rafael Ibarra Lopez, Chrome security team

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