Browser extension
HaveFun for Chrome
Browse any card shop and HaveFun marks every card on the page, so you never buy one you already own by mistake:
Each card's market price shows beside the shop's price, so you can tell a good deal at a glance. At checkout, press Price my basket in the extension and every card in your basket lands in HaveFun with what you paid already filled in.
Chrome, Edge, Brave, Opera and Arc on a computer
HaveFun for Chrome is part of HaveFun Pro. Sign in to HaveFun in this browser to download it. It's also in the app, under Settings → Downloads. If you're not on Pro yet, the button takes you to the app to upgrade.
We're waiting on the Chrome Web Store to list it. Until then it's installed by hand, which takes about two minutes and the steps below. Once it's in the store, you'll be able to install it with one click.
Install it
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Unzip the download
Open the file you just downloaded. On a Mac, double-click it. On Windows, right-click it and choose Extract All. You'll get a folder called havefun-extension-1.0.7.
Move that folder somewhere it can stay, like Documents. Chrome runs the extension from it, so if the folder is deleted, the extension stops working.
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Open Chrome's extensions page
Copy this into the address bar and press Enter. Clicking it selects the whole address. Chrome doesn't let websites link to its settings pages, so it has to be pasted:
chrome://extensions
Edge:
edge://extensions· Brave:brave://extensions· Opera:opera://extensions -
Turn on Developer mode
The switch is in the top-right corner of the page.
Developer mode
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Click Load unpacked and choose the folder
A new row of buttons appears at the top. Click Load unpacked, then choose the havefun-extension-1.0.7 folder from step 1. Select the folder itself, not the .zip and not a file inside it.
Load unpacked
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Pin it, and sign in
Click the puzzle-piece icon next to the address bar and pin HaveFun so it's always one click away. Then make sure you're signed in to app.havefundex.com in the same browser. That's how the extension knows what's in your collection.
That's it. Open any card shop and the marks appear beside the card names.
Updating
When there's a new version, download it again from this page and unzip it (step 1). Then on
chrome://extensions, click Remove on the old HaveFun, and
Load unpacked the new folder (step 4). You can then delete the old folder.
Your collection isn't affected. It lives in your HaveFun account, not in the extension.
If something's not right
Chrome says "Manifest file is missing or unreadable".
The wrong thing was chosen in step 4. Choose the folder that has a file called
manifest.json directly inside it, not the .zip and not the folder above it.
Chrome warns about developer mode extensions.
Chrome shows this for every extension installed by hand rather than from the store. It's expected. Close the message and the extension carries on working. It goes away once HaveFun is in the Chrome Web Store.
It says "Part of HaveFun Pro".
The extension works with a Pro account. Press Go Pro in it to upgrade in the app, then click the extension's icon again. It checks every time it opens.
No marks appear on a shop's page.
Check you're signed in to app.havefundex.com in the same browser with your Pro account, then reload the shop's page. Click the HaveFun icon: it shows whether you're signed in and your collection has synced.
What does it read, and where does that go?
It reads card names on the page you're looking at, in your browser, to match them against your collection. It doesn't send shop pages anywhere, and it only talks to HaveFun. The details are in the privacy policy.
Safari and Firefox aren't supported yet, and nor are phones. Browser extensions on phones are very limited, so on a phone you can scan cards in the HaveFun app instead.
Stuck? Email hello@havefundex.com and we'll help.