Download and unzip. Unzip the file to get a folder called better-polymarket. Keep it somewhere you won’t delete it.
Open your extensions page. Go to vivaldi://extensions in Vivaldi.
Turn on Developer mode(1) (top-right), then click Load unpacked(2) and choose the better-polymarket folder (the one with manifest.json inside).
Pin it. Click the puzzle-piece icon in the toolbar and pin Better Polymarket so it stays one click away.
Open Polymarket and sign in. Head to polymarket.com, open the rail on the left, and sign in with your wallet to switch everything on.
Safe and standard. Early Access loads through Vivaldi’s built-in developer mode, the same way developers load extensions. Vivaldi may show a quick developer-mode note at startup; that’s expected and harmless.
Troubleshooting
“Load unpacked” is greyed out: turn on Developer mode first.
It errors on load: you probably picked the zip or a parent folder. Choose the folder that has manifest.json directly inside.
The rail doesn’t show: refresh the Polymarket tab after installing.