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KnowwKnoww
Issue № 03 — The Extension

See relevant prediction-market odds
while you browse.

The Knoww Chrome extension reads the page you’re on - a post on X, a Reddit thread, a news story — and surfaces live Polymarket odds on that exact question, right where you’re reading.

Add to Chrome — FreeExplore markets first
v2.5.57Manifest V3Chrome50+ sites
02/Supported sites

Works where the internet argues.

The Knoww prediction market browser extension runs on the places debates actually happen — X, Reddit, Hacker News, and major news, finance, and crypto media.

Host access is limited to supported sites: the extension cannot see anything else you browse. The full, current list lives in the extension settings.

X / TwitterRedditNews sitesCrypto mediaFinance sitesGoogle SearchDiscord WebSubstackHacker NewsBloombergMore coming soon
Knoww.App
● ACTIVE
Scanning page context0.42s
Relevant markets found3
Best match confidence91%
TOP MATCH
Incumbent-party win, 2028 US Presidential Election
YES 42.6%
NO 57.4%
03/How matching works

How matching works.

01
Read

The extension reads the visible text of the post or article you’re viewing, in your browser.

02
Match

A small on-device embedding model compares it against Polymarket markets and ranks the closest matches. By default, nothing is sent to a server for matching.

03
Surface

When there’s a confident match, live odds are fetched from Polymarket and appear inline, right on the page.

04
Decide

Open the market, track it, or take a position. If you trade, you review and sign every transaction yourself.

An optional AI-assisted mode can send short, truncated text excerpts to Knoww APIs for better topic extraction. You control it from the extension settings, where you can also turn off usage analytics.

04/Permissions & privacy

Permissions, and why we ask.

The extension asks for exactly six Chrome API permissions. Host access lets matching run on supported sites. Clicking Knoww on an unsupported site grants temporary tab access to show a site-support request prompt.

What stays in your browser: page text and matching (by default), your settings, and local caches. On unsupported sites, the prompt reads only the current domain; it does not inspect page content. What reaches knoww.app: market lookups, usage events while analytics is enabled, and text excerpts only if you turn on AI-assisted matching. You can turn analytics off in settings.

Read the full privacy policy
  • activeTab

    Temporarily accesses the current tab when you click Knoww to show a site-support request prompt on unsupported sites.

  • storage

    Keeps your settings and cached matches in your browser.

  • scripting

    Injects the odds overlay into supported pages.

  • offscreen

    Runs the local matching model in the background.

  • sidePanel

    Shows the market side panel next to the page.

  • alarms

    Schedules order-status checks for trade analytics in trading-enabled builds, while analytics is enabled.

05/Trading

If you want to act on it.

Seeing the odds is free and needs no account or wallet. If you decide to trade, Knoww is non-custodial: you connect your own wallet, hold your own funds, and review and sign every transaction before it is placed. Nothing trades on your behalf.

Non-custodialYour own walletYou sign every transaction
06/Install

Install in under a minute.

01
Add to Chrome

Install from the Chrome Web Store — free, one click of Chrome’s own install button.

02
Pin the icon

Pin Knoww from the puzzle-piece menu so settings stay one click away.

03
Browse

Read like you normally do. When a page matches a market, live prediction-market odds appear.

Add to Chrome — FreeVersion 2.5.57 — see what’s new
07/FAQ

Frequently asked questions.

Is the extension free?
Yes. Discovery and live odds are free. If you choose to trade, you use your own funds.
Which browsers are supported?
Chrome, plus Chromium-based browsers that install from the Chrome Web Store — Brave, Edge, and Arc.
Does Knoww read my browsing history?
No. Full page matching runs only on supported sites. On other sites, a lightweight request prompt sees only the current domain and does not inspect page content. Usage analytics records feature events and the current domain, not page addresses or page text, and you can turn it off in settings.
Do I need an account or a wallet?
Not to see odds — discovery works with nothing connected. Trading requires connecting a wallet.
Where do the odds come from?
Polymarket — live prediction-market prices from real trading, not editorial estimates.
What data does Knoww collect?
Settings and caches stay in your browser; optional features are off by default. See the privacy policy for the complete picture.
Free on the Chrome Web Store

The internet,
with odds attached.

Install Knoww and see live Polymarket odds on the posts, threads, and stories you already read.

Add to Chrome — FreeExplore markets