Mozilla’s web browser uses an “HTTPS only” mode offering additional security while you are browsing. Here’s how to activate it.
Beginning with Firefox 83, Mozilla web browser users have the option of activating an “HTTPS only” mode. When this feature is enabled, Firefox will attempt to automatically load the secure version of the site you want to visit when it exists.
And if, however, you happen to come across a website that does not support the HTTPS protocol, Firefox will ask you for your authorization before confirming or not the loading of the page on your machine. Find out how to enable HTTPS-only mode in Firefox.
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1. Open Options
Open a Firefox window and click on the main menu represented by three superimposed lines. Then go to the Options menu to access the browser settings.
2. Activate HTTPS only mode
In the Firefox settings window that appears, go to the section devoted to Privacy and security in the left column.
Then scroll through all the displayed options to the bottom of the window. There you will find options related to HTTPS Mode only.
By default, this mode is disabled. You can choose to Activate HTTPS mode only in all windows, or Activate HTTPS mode only in private windows only.
3. Browse an unsecured site
If you happen to come across an unsecured site that does not support the HTTPS protocol, Firefox will not load the page on your machine and will display a warning window.
You can, if you wish and with the risks that this may involve, choose to Continue to the HTTP site, which will temporarily deactivate the HTTPS-only mode that you have activated.
You can also click on the padlock icon in the Firefox address bar to directly manage the activation of this function in the browser.