Firefox will now block cryptomining scripts by default

There’s huge news from the Mozilla camp today: an upcoming release of Firefox will have a neat new cybersecurity feature built-in – blocking fingerprinting and crypto mining scripts.

Fingerprinting is problematic because it lets advertisers track the users’ actions online, while crypto mining is unethically taking advantage of unused CPU resources to make money from them.

The new version of Firefox employs a blacklist that lists every website in existence known to employ any of these two practices. The blacklist was compiled by Disconnect, a VPN maker.

One way to tag a browser without resorting to cookies is to measure the length of the window – a technique otherwise known as letterboxing. Firefox is now fighting against this by giving its users the option to turn it off in the settings section.

Firefox version 67 will be released during May. Of course, no cybersecurity measure is water-tight, so the blacklist it’s going to feature can only be as good as the amount of effort put into it by Disconnect. It may very well become outdated and thus irrelevant over time.

Mozilla claims they will keep collaborating will Disconnect to include more blacklisted domains over the course of time. They are also concerned that implementing the new cybersecurity features could break the functionality of certain websites, so they are still in the process of gathering feedback before releasing it to the public. However, all in all, it’s their intention for a future version of Firefox to include these protections by default.