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There’s a ritual most of us go through when we set up a new browser or a new PC. Install an ad blocker. Maybe grab a dark mode extension. Throw in whatever productivity tool got recommended on Reddit last week. Click ‘Add to Chrome’ a few times, grant whatever permissions the popup asks for, and get on with your life.
It’s fast. It’s painless. And for a lot of people who spend a significant portion of their day gaming through a browser — whether that’s managing their Marvel Snap collection, accessing web shops, checking tier lists, or streaming through a web-based client — it’s also a habit worth reconsidering.
This isn’t a scare piece. Browser extensions are genuinely useful, and the vast majority of what people install is harmless. But the less glamorous reality is that your browser is one of the more exposed parts of your setup, and the way most gamers treat extensions reflects almost none of that.
What Actually Happens When You Install an Extension
When you add an extension to Chrome, you’re often granting it permissions that go well beyond what you’d expect. ‘Read and change all your data on the websites you visit’ is one of the most commonly requested permission sets — and it means exactly what it says. The extension can see and modify content on any page you load, including login forms, gaming dashboards, and web shop checkout pages.
Security researchers have been flagging this for years. A 2025 academic study published on arXiv demonstrated that malicious extensions can be built, published to the Chrome Web Store, and executed in ways that bypass the store’s existing vetting process. The researchers found that extensions could harvest credentials, manipulate page content, and log activity — all while appearing completely functional and legitimate to the end user.
The threat isn’t always a rogue developer acting in bad faith from day one, either. Barracuda Networks documented a pattern in early 2026 where previously clean, well-reviewed extensions had malicious code inserted through later updates — what researchers are calling ‘sleeper agent’ extensions. The extension you trusted six months ago may not be the same thing it is today.
Why Gamers Are a Particularly Attractive Target
Gaming accounts have real monetary value — something that’s increasingly obvious as in-game economies, limited cosmetics, and digital storefronts have matured. A Marvel Snap account with a deep collection, accumulated gold, and web shop purchase history is worth something. So is any gaming account with linked payment methods, stored credentials, or platform currency.
Gamers also tend to install more browser extensions than average users. Trackers, deck builders, guide tools, screenshot utilities, stat overlays — the average enthusiast has several running at once. Every additional extension is an additional point of potential exposure, particularly if they were downloaded from secondary sources rather than official stores.
The web shop situation makes this more specific. As you’ll know from the Marvel Snap web shop coverage here, players in certain regions are geo-blocked from accessing the shop at all — which means workarounds are common. Some of those workarounds involve browser-level tools, and not all of them are safe. It’s the kind of scenario where someone looking for a quick fix can end up with something that’s doing a lot more than helping them claim Daily Rewards.
What You Should Actually Have Running
The principle worth adopting here is simple: fewer extensions, and more intentional ones. Rather than accumulating tools passively, it’s worth auditing what’s installed and thinking clearly about what each thing actually does and why you granted it the permissions it has.
With that in mind, a few categories of extension earn their place:
● An ad blocker from a developer with a clear, long-standing reputation. uBlock Origin remains the standard recommendation — it’s open source, regularly audited, and transparent about what it does.
● A tracker blocker or privacy-focused tool that limits how third parties profile your browsing across sites. The Electronic Frontier Foundation’s Privacy Badger operates on behavioral detection rather than a static blocklist, which makes it harder to evade.
● A VPN extension for Google Chrome — specifically for sessions where you’re accessing gaming-adjacent web services on networks you don’t fully control. A browser-level VPN encrypts your traffic at the browser layer, masks your IP from the sites you’re connecting to, and adds meaningful protection when you’re doing anything that involves account credentials or payment details on a public or shared connection.
What’s worth avoiding: extensions that promise to do too many things at once, extensions from developers you can’t verify, and — critically — anything from outside the official Chrome Web Store. Sideloaded extensions skip the store’s vetting process entirely, however imperfect that process is.
The Permission Audit You’ve Probably Never Done
There’s a page most Chrome users have never visited: chrome://extensions/. It lists everything installed, and for each extension, you can click ‘Details’ to see the exact permissions it’s been granted.
If you spend five minutes on it, you’ll almost certainly find at least one extension with permissions that feel excessive for what it actually does — or something you installed years ago and completely forgot about. Old, unmaintained extensions are among the highest-risk items in anyone’s browser, precisely because ownership changes and silent updates happen without any notification to the user.
Google’s own Chrome browser extension management documentation lays out what each permission category means in plain language. It’s aimed at enterprise administrators, but the explanations are clear enough that any user can work out whether a given extension actually needs what it’s asking for.
The Takeaway
None of this requires paranoia or a complete overhaul of how you use your browser. The point is simply that most gamers — people who think carefully about card costs, cube management, and meta positioning — apply almost none of that analytical energy to what’s running in their browser.
Your Marvel Snap collection tracker and your deck-building tools are fine. But it’s worth taking twenty minutes to check what else is in there, what permissions everything has, and whether your browser setup would hold up if someone was actively looking for a way in. For everything else about optimising your Snap experience, the guides section here has you covered — this is just the part most guides don’t think to mention.
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