Install the Chrome extension

Every Repocellar account includes the extension. It's a ZIP file you download from your dashboard and load into Chrome — about two minutes.

Step by step

Step 1
Unzip it somewhere permanent
Unzip the download and move the repocellar-extension folder somewhere you won't tidy away, like Documents. Chrome loads the extension from this folder, so if you delete or move it later, the extension stops working.
Step 2
Open Chrome’s extensions page
Type chrome://extensions into the address bar and press Enter. (Menu ⋮ → Extensions → Manage extensions gets you there too.)
Step 3
Switch on Developer mode
Use the Developer mode switch in the top-right corner. It only lets Chrome load extensions from a folder; it doesn't change anything else about your browser.
Step 4
Load the folder
Click Load unpacked and choose the repocellar-extension folder — the one that contains manifest.json. A Repocellar card appears in the list.
Step 5
Pin it and sign in
Click the puzzle-piece icon in Chrome's toolbar and pin Repocellar. Click it, choose Sign in, and approve the connection in the window that opens. Then open your repositories on github.com — Repocellar's buttons appear next to each repository in the list.

Extensions installed from a ZIP don't update themselves. When a new version is out, your dashboard and the extension's popup both say so.

Download the new ZIP from the Extension page of your dashboard and unzip it.
Replace the contents of your existing repocellar-extension folder with the new files (keep the folder where it is).
In chrome://extensions, click the circular arrow on the Repocellar card to reload it. You stay signed in.

“Manifest file is missing or unreadable”: You picked the wrong folder. Choose the repocellar-extension folder itself — the one with manifest.json directly inside — not the folder above it or the ZIP file.
There’s no Developer mode switch, or Load unpacked is greyed out: Your Chrome is probably managed by an employer or school, and they’ve turned off loading extensions this way. Use a personal Chrome profile or computer, or ask your IT team.
The extension disappeared or shows an error after a restart: The folder was moved, renamed or deleted. Put it back, or download the ZIP again, unzip it, and repeat Load unpacked.
No Repocellar buttons on github.com: Make sure you're signed in to the extension (click its icon), then reload the GitHub page. Buttons appear next to repositories in repository lists, such as github.com/your-name?tab=repositories.
Sign-in window closes without signing in: Sign in to the Repocellar website in the same Chrome profile first, then click Sign in in the extension again. If it keeps happening, remove the extension’s session in Settings → Connected devices and try once more.
The dashboard says “not detected” but it’s installed: The dashboard can only see the extension in the same Chrome profile. Check you’re in the right profile, then reload the page.

Chrome may show a notice about extensions in developer mode, sometimes each time it starts. That's expected for any extension installed from a folder. Choose to keep it.
Only install Repocellar from the ZIP in your own dashboard. If someone sends you a copy by email or chat, don't use it.
The extension asks for access to github.com, api.github.com, GitHub's download servers, Repocellar and our storage provider — the sites it needs to copy and upload repositories. It doesn't read other sites.
Repocellar works in Google Chrome 116 or later. Other Chromium browsers (Edge, Brave, Arc) often work but aren't supported.