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Google Chrome will block insecure downloads as part of its policy: The history and the updates



Google will eventually remove support for insecure downloads (non-HTTPS downloads started on secure pages) on Chrome and will begin displaying a warning message on the browser's console with version 81 coming out next month for desktop platforms (Windows, macOS, Chrome OS, and Linux).


Users will begin to see a warning for 'executables' in version 82, as such file types generally carry the most risk. Subsequent releases will cover more 'mixed content downloads' including zip files, disk images, documents, and multimedia over the coming months to "mitigate the worst risks quickly, provide developers an opportunity to update sites, and minimize how many warnings Chrome users have to see."




Google Chrome will block insecure downloads in coming months




In subsequent versions, the same warn-and-block process will start to apply for downloads such as .doc and PDFs, images, videos and music files until, by Chrome version 86 in October, all downloads via HTTP will be blocked.


Developers who want to test their sites can enable a warning message in Chrome Canary (or v81 when that is released) by enabling the Treat risky downloads over insecure connections as active mixed content flag at using chrome://flags/#treat-unsafe-downloads-as-active-content.


This comes handy in situations when you accidentally navigate to the unsecured version of the website. In case, there is no secure version of the website available, then a warning message will pop up asking you if you would like to continue. Now, a new code has been spotted, which details that Google is working on expanding the security to protect users from insecure HTTP downloads.


When you click an HTTPS download link, it takes you to an insecure HTTP server followed by a final HTTPS connection. In this scenario, Google Chrome will block the download as unsafe. Similarly, if you are trying to download any file from a website that is only available in HTTP, then Chrome will block any downloads from that website.


Well, just like other Google Chrome forms of blocking insecure websites and downloads, you will be able to bypass this block as well. So, the new Google Chrome toggle to block insecure HTTP downloads can be seen as a loud warning instead of an actual feature that blocks the download for real.


An important thing to note is that, when it comes to the padlock in the omnibox, Chrome will happily show the padlock and state that the page is secure if there are insecure resources that it is blocking. This does NOT mean that all your content is neccessarily loading.


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I think the issue is that some of the legacy download mirrors don't use sftp (=secure FTP, encrypted like https). If you try to left-click on these in chrome, nothing happens because Chrome is blocking the insecure transfer. It looks like Chrome is completely blocking insecure FTP now - note the greyed out 'save link as' option on right click:


And by Chrome 85, out in September, the mixed content warning will shift to images, audio, video, and text (e.g. .png, .mp3), with blocking becoming the default behavior for the other files. With Chrome 86, in October 2020, the warnings will be gone and Chrome will refuse to download any mixed content.


According to a report by 9to5Google, Google is planning to introduce a security feature which will eventually block any insecure downloads which users might want to open through HTTP websites. It is noteworthy that over the last few years, the American browser was trying to make Chrome a secure platform by encouraging users to possibly use only HTTPS websites.


Sadly, this does mean that you will no longer be able to use Signal as your default messaging application on your Android smartphone once SMS support is fully removed in the coming months. Because of that, it is suggested that you transition to a new default application on your device. You may want to disable this function now and can check by heading to Signal > Account > Select Chats > SMS/MMS. If SMS is enabled, you may need to export to another app. 2ff7e9595c


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