First announced in December last year at the experimental stage, Firefox Focus is designed for those moments when you don’t want people tracking your activity.
"You may be looking for information that in certain situations is sensitive - searches for engagement rings, flights to Las Vegas or expensive cigars, for example. And sometimes you just want a super simple, superfast web experience - no tabs, no menus, no pop-ups," the firm said.
There's no need to change any settings as you are protected from the get-go and have control over whether or not Focus blocks ad trackers, analytics trackers, social trackers or "other". The first three are set as on by default.
There’s also an ad blocker, which you can set to divert selected sites to an alternative browser if they won’t display properly owing to restrictions on the site. Mentioning no names.
The browser has a variety of other uses and can also give a speed boost to sites that are slowed down by the amount of advertising and cookie logging.
Mozilla explained: “We live in an age where too many users have lost trust and lack meaningful controls over their digital lives.
"For some users, it seems as though your web activities can follow you everywhere - across devices, across accounts. To make matters worse, the web can often feel cluttered. That’s why we are introducing Firefox Focus.”
Focus also deletes all records of a session with a single tap.
This is the latest version of Firefox to appear for iOS, following the early attempts with Firefox Home, which had limited functionality in order to avoid using Apple’s WebKit rendering engine.
This was then followed by Firefox for iOS which, in common with all other iOS browsers, plays ball with Apple's WebKit rules.
Firefox Focus can also be used for porn, but we’re not sure whether Mozilla has thought of that as it seemed strangely absent from the press release.