The wording "still using Firefox?" does suggest subtly that Firefox is outdated or passé... so no, their wording is problematic, as also is the placement of the

The wording "still using Firefox?" does suggest subtly that Firefox is outdated or passé... so no, their wording is problematic, as also is the placement of the ad. It is also unnecessary given Firefox's rather small market share and the fact that Edge will be bundled with Windows which means that almost everyone who doesn't use Chrome will likely use Edge.