Polymarket Browser Extensions
Polymarket browser extensions add to the site you already use instead of replacing it: wallet labels, position overlays, faster order entry and shortcuts layered onto the native interface. They run locally in Chrome or Firefox and read the page you are on, so there is nothing to host and no second account to keep. Traders use them for the small friction that adds up, like seeing who is on the other side of a trade without leaving the market.
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13/wk View
Poly Helper
A free browser extension that embeds live charts, news feeds, and market data directly into Polymarket pages.
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4/wk View
PolyParlay
Polymarket traders use PolyParlay to combine multiple prediction markets into single parlay positions for multiplied payouts.
Polymarket Browser Extensions
The Polymarket interface is clean and thin. Extensions add the layer on top of it: order book depth, top holders, your edge on the market in front of you, odds from outside sources, and notes on the thesis you had when you entered.
Because it renders inside the page, you stop leaving the page. Whale positions sit next to the probability. Your cost basis sits next to the live price. A watchlist alert reaches you without a second dashboard open somewhere.
Everything listed here is read-only. Extensions take your wallet address and show you data back. None of them ask for keys or signing rights, and one that did would not belong in this category.
How to choose a Polymarket browser extension
What actually separates one from another, before you connect anything.
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Permissions
Read what it asks for at install. An overlay needs to read the Polymarket page and nothing else. Access to all sites is a much bigger ask and deserves a reason.
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Whether it touches your wallet
Most extensions only change what you see. Any that place orders are signing transactions, which puts them in the same category as a trading bot.
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Browser support
Chrome coverage is near universal, Firefox and Safari much less so. Check before assuming, especially on Safari.
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Whether it still works
Extensions break when Polymarket changes its markup. Look at the last update date, because an abandoned extension usually fails silently rather than loudly.
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Open source
Extensions run inside the page you are trading on. Being able to read the code, or knowing someone has, is worth more here than almost anywhere else.
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What it does with your data
An extension can see everything on the page. Check whether anything is sent anywhere, and prefer ones that state plainly that nothing is.
Frequently asked questions
What people ask before picking browser extensions.
What do Polymarket extensions add?
Mostly context the site leaves out: labels on wallets, position and profit overlays on markets, faster order entry, and shortcuts. They change the page you already use rather than replacing it.
Are browser extensions safe to use with a crypto wallet?
They deserve more caution than most software, because an extension with page access can see and alter what you are looking at. Install few, prefer open source, review permissions at install, and remove ones you stopped using.
Will an extension slow the site down?
A well-built one is unnoticeable. Several at once, or one doing heavy work on every page change, will be felt. If Polymarket feels sluggish, disabling extensions is the first thing to try.
Do they work on mobile?
Generally not. Extensions are a desktop browser feature, and mobile browsers mostly do not support them. On a phone you want a mobile app or a Telegram bot instead.
Can Polymarket ban me for using one?
Extensions that only change your view are reading public data on your own screen. Anything automating actions at speed is a different matter, and worth checking against the terms before relying on it.
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