Prerequisites

  • Chrome โ‰ฅ 114, Firefox โ‰ฅ 121, Edge โ‰ฅ 114, or Brave โ‰ฅ 114
  • No API keys or accounts needed โ€” the extension is 100% client-side

Option 1: From the Chrome Web Store

Pending review โ€” link will appear here once published.

  1. Visit the TrendCast listing on the Chrome Web Store.
  2. Click Add to Chrome.
  3. Confirm the permission prompt.
  4. The ๐Ÿ“Š TrendCast icon appears in your toolbar.

This also works for Edge and Brave (both are Chromium-based and can install from the Chrome Web Store).


Option 2: From Firefox Add-ons (AMO)

Pending review โ€” link will appear here once published.

  1. Visit the TrendCast listing on Firefox Add-ons.
  2. Click Add to Firefox.
  3. Confirm the permission prompt.
  4. The ๐Ÿ“Š TrendCast icon appears in your toolbar.

Option 3: From GitHub Releases (manual load)

Chrome / Edge / Brave

  1. Go to the Releases page.
  2. Download trendcast-chrome-vX.Y.Z.zip from the latest release.
  3. Unzip the file.
  4. Open chrome://extensions (or edge://extensions, brave://extensions).
  5. Enable Developer mode (top-right toggle).
  6. Click Load unpacked and select the unzipped folder.
  7. The ๐Ÿ“Š TrendCast icon appears in your toolbar.

Firefox

  1. Go to the Releases page.
  2. Download trendcast-firefox-vX.Y.Z.xpi.
  3. Open about:addons.
  4. Click the gear icon โ†’ Install Add-on From File.
  5. Select the .xpi file.
  6. Confirm the installation.

Option 4: Build from source

git clone https://github.com/ozkanpakdil/TrendCast.git
cd TrendCast
bun install

# Build for Chrome
bun run build

# Build for Firefox
bun run build:firefox

The built extension is in dist/. Load it as an unpacked extension (Chrome) or via about:debugging โ†’ “This Firefox” โ†’ “Load Temporary Add-on” (Firefox).


First Run

After installation:

  1. Open a new tab โ€” the TrendCast dashboard appears (if new tab override is enabled). You’ll see an empty state initially.
  2. Click “Collect Now” โ€” in the header or popup to trigger the first data collection cycle.
  3. Browse social platforms โ€” visit X, Reddit, or TikTok to see the odds overlay appear.
  4. Customise settings โ€” click โš™๏ธ Settings to toggle sources, change the collection interval, or switch the correlation engine.
Note: Social signal scraping (X, Reddit, TikTok) uses your active login session. You need to be logged in to those platforms for the content scripts to scrape trending posts. News and market data (BBC, CNN, Polymarket, Kalshi) require no login.