Every click, captured
Click a link and the Download window opens with the file name, size and resume support known. Hold Alt to let the browser have it instead.
Browser extension
A download manager extension for Chrome, Edge, Firefox, Brave and Opera
Click a download link and the Prism window is there in about a quarter of a second. The extension hands downloads, videos and links from your browser to the free Prism app, which fetches them over up to 32 connections and resumes them after a crash.
What it does
Your browser finds it. Prism downloads it.
The extension doesn’t download anything itself: it passes each download to the Prism app on your computer, which is much better at it than a browser.
Your rules
File types, MIME types and sizes decide what Prism takes and what stays in the browser. Images stay in the browser unless you add them.
A button on every video
Hover a video for Download video, or open the popup to see every stream on the page. MP4 in the quality you want, or MP3.
Right-click menu
Download with Prism for one link, or grab all the links, images or videos on a page at once.
Signed-in downloads work
Files behind a login keep working: the site’s cookies go only to the Prism app on your own computer.
Updates by itself
From the Chrome Web Store, the extension stays up to date on its own in every Chromium browser.
Install
Two minutes, once.
First the app, then the extension. Prism also walks you through it the first time it starts.
Step by step
Install the Prism app
Free for Windows, macOS and Linux, or pick your file from the download section.
Add the extension to your browser
From the Chrome Web Store, or for Firefox from Firefox Add-ons — see the table.
Pin the Prism icon and check it says Connected
Then click any download link to try it.
| Browser | How to add Prism |
|---|---|
| Chrome | Chrome Web Store → Add to Chrome. |
| Microsoft Edge | Chrome Web Store; the first time, click Allow on Allow extensions from other stores. |
| Brave, Vivaldi | Chrome Web Store → Add to Brave / Add to Chrome. |
| Opera | Add Opera’s free Install Chrome Extensions add-on, then use the Chrome Web Store. |
| Helium | The Chrome Web Store’s add button (Helium installs store extensions through its own proxy). |
| Firefox, Zen | Firefox Add-ons → Add to Firefox (Firefox 140 or later). Older versions can load prism-firefox.zip from the release as a temporary add-on. Guide. |
| Safari | Not supported. |
Privacy
It talks only to your own computer.
For each download, the extension passes the address, the page it came from, the browser’s user agent and that site’s cookies to the Prism app — through the browser’s native messaging, never over the network. No servers, no analytics, no account.
Does the extension work without the Prism app?
No. The extension hands downloads to the Prism app on your computer, which does the downloading. Without the app running, the browser keeps its downloads as usual. Both are free.
Which browsers does it work with?
Chrome, Microsoft Edge, Brave, Opera, Vivaldi and Helium from the Chrome Web Store, and Firefox and Zen from Firefox Add-ons. Safari isn’t supported.
Is Prism in Firefox Add-ons?
Yes: Prism Download Manager in Firefox Add-ons, for Firefox 140 or later and Zen. Firefox keeps it up to date.
Why does the popup say “Not connected”?
Start Prism (it lives in the tray), then click Retry in the popup. Still failing? Open Prism → Settings → Browser integration → Repair, then restart the browser. Browsers installed as a Flatpak on Linux can’t talk to desktop apps at all.
Can I keep IDM’s or another download manager’s extension?
Keep only one of them turned on. Two extensions competing for the same download means neither works reliably.
What does the extension send, and where?
A download’s address, the page it came from, the browser’s user agent and that site’s cookies — only to the Prism app on your own computer, through native messaging. No network, no servers, no analytics.
More about Prism
Everything else Prism does.
The Prism home page has the full feature tour, benchmarks and the install guide.
Prism homeFeatures, benchmarks, film and guide.
Prism for WindowsInstaller, MSI or portable for Windows 10 and 11.
Prism for MacApple Silicon and Intel, macOS 11 or later.
Prism for Linuxdeb, rpm or AppImage for any distribution.
An alternative to IDMWhat carries over from Internet Download Manager.
Hugging Face modelsGGUF and safetensors, only the files you need.
One beam. Many rays.
Free, open source and ready for your next big download.