Mozilla performs at Firefox some silent changes that do not excite them users of, after sporadic ad views were reported.
Not only is it Microsoft that changes Edge but Mozilla has also started the changes, since it started to show advertisements in new tabs, with users reporting that it occurs on all supported desktop platforms.
Such as reported in reddit, a small pop-up appears at the bottom of the screen and includes a link to the booking company Booking.com. And of course by clicking the "Find a hotel" button, users go to the Booking address.
It appears that these messages appear only occasionally and only for a specific set of users, so Mozilla is likely to carry out a limited experiment. In our personal computers we have not yet seen such behavior.
According to tests performed by users on reddit, ad messages may stop appearing if you turn off "Excerpts" from Firefox settings. Although the official "Quotes" update states that they are updates from Mozilla for Firefox, and have nothing to do with ads, the company uses them for its testing.
Mozilla has not issued a statement as to whether it is merely running an experiment or that is the expected behavior in Firefox 64.
However, it goes without saying that users are not happy with the ads that appear on program browsing and although they are allowed to disable the feature, the fact that it is enabled against their will may cause more frustration to the existing user community.
More official information from the Mozilla engineers will probably come to us in the next few days, after the holidays.