Browsers need money. They're placing ads now.

Internal communications within some major players the browser industry reported a rising suggestion to Introduce Ads on Error Pages

This pretty annoying, yet interesting approach aims to monetize browser error pages - such as those indicating unreachable sites by integrating "featured site buttons" and bookmarks.

According to some public comments made by Microsoft Edge developers, 

The new feature will display "featured site buttons," which can effectively serve as advertisements for various online services or products. Additionally, users will be presented with bookmark suggestions, potentially highlighting specific websites or services aligned with their browsing history or interests.

This strategy is part of a broader trend where web browsers are exploring novel ways to generate revenue. As competition intensifies in the browser market, companies are increasingly turning to alternative monetization methods to sustain their free-to-use platforms. By integrating ads directly into error pages, these browsers aim to tap into a previously underutilized space, providing a new revenue stream while keeping the core browsing experience free for users.

Earlier, the only source of income was to make your own search engine or put google as your default search engine so that they will pay you billions...

So don't be amazed to see more annoying trends on the internet! 

And be aware that this might just never be a thing - if the world has some luck!