Opera used to be a fantastic web browser, with a custom high-performance Presto rendering engine and features like tabbed windows that didn't show up in competing browsers until years later. However, the modern Opera browser is a shadow of its former self, reliant on chasing trends and meme advertising to
Why would we need them to switch? Shouldn’t we just leave them be if they’re happy that way?
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More importantly, using Firefox (or any of its forks) would mean less people are dependent on Google’s Chromium. With less people depending on Google’s Chromium, the less Google can swing its weight around, imposing its dictum on unsuspecting users.