The browser is where most of us spend our online lives, and by default it is a remarkably leaky window. Advertisers, data brokers and analytics firms follow you from site to site, quietly assembling a profile of your interests, habits and identity. You cannot close every gap, but ten minutes of settings can meaningfully shrink the surveillance without breaking the web.
The aim here is not paranoia or perfect anonymity — it is reasonable hygiene, the digital equivalent of closing the curtains.
The high-value settings
Start with third-party cookies — the ones set by companies other than the site you are visiting, which are the backbone of cross-site tracking. Most modern browsers let you block them, and doing so breaks very little while cutting a lot of tracking. Next, look for tracking-prevention or "enhanced protection" options and turn them up. Turn off ad-personalisation where the browser offers it.
A reputable content blocker extension goes further, stopping many trackers and intrusive ads before they load, which also makes pages faster and lighter. Choose a well-known, open one rather than an obscure extension that could itself be spying on you.
Search, and the small habits
Your search engine sees an enormous amount about you, because searches are among the most revealing data there is. Switching your default to a search engine that does not build an advertising profile is a single change with an outsized privacy return, and the results are good enough for everyday use.
Two small habits help too: sign out of accounts you are not actively using so you are not tracked while logged in, and use your browser's private window for one-off sensitive searches. Neither is magic, but together they reduce the trail you leave.
Know the limits
Be honest about what this achieves. These steps reduce casual, commercial tracking; they do not make you invisible, and the sites you log into still know who you are. Treat them as raising the cost and lowering the volume of tracking, not eliminating it.
That modest framing is the right one. A browser you have tuned in ten minutes leaks far less than a default one, and you can do it once and forget it — the settings keep working every day without further effort.