The same way it happened 10 years ago. If your non-techie family and friends for some reason have desktops or notebooks and not just phones and tablets, then ask them to use Firefox (or install it for them yourself). If they don't want to use Firefox but they have a MacBook, check if they're using Chrome, and if so, ask them to use Safari instead. If they're interested in getting a computer and want a recommendation, suggest they get a Mac instead of a Windows machine, and get them to use Safari or Firefox instead of Chrome. If they're trying to decide between an Android device and something from Apple, tell them that either is acceptable, but if they go for Android, ask them to install and use mobile Firefox instead of Chrome.

If a techie friend is thinking about starting a project and there's a chance that they'll choose Electron, ask them to consider building on top of WebKit instead. In general, spread the word far and wide that WebKit exists and avoid feeding into the popular misconception that the only choices are Firefox or Chrome. If you yourself are interested in alternative, non-mainstream browsers, look first for a WebKit-based one, and maybe consider contributing yourself. However, if you're already using Firefox and consider it acceptable, try to keep using it instead of switching to WebKit. If you're looking to switch, try holding on as long as possible, but make sure your criticism is clear. (And it should be well-informed, too; as Frank Hecker mentioned, albeit more politely, there are too many people talking out of their ass when it comes to Mozilla. That goes for detractors and advocates. The level of uninformedness every time Mozilla comes up—including the tweets quoted in the article—is pretty unreal.)