Record Your Screen in Firefox and Save It as MP4
This tool records your screen, window, or a browser tab directly in Firefox and saves the result as an MP4 file. It runs on the built-in screen-capture APIs every modern browser ships with, so there is nothing to install: no extension, no add-on, no permission prompt from an add-on store.
You don't need to sign up to start recording. ScreenApp works in Chrome, Firefox, Safari, and Edge, so the same recorder works if you switch between Firefox and another browser during the day. ScreenApp’s browser extension is built for Chrome, Edge, Brave, Opera and other Chromium browsers, not Firefox, which is why the browser recorder above is the way to record your screen here.
What you get:
- Recording sources: screen, window, browser tab, microphone and camera, with system audio
- Video quality up to 4K, depending on the computer
- no watermark on any recording or export
- Free plan: 2 transcriptions of recordings up to 45 minutes each
- MP4 download or a shareable link when you stop recording
How to Record Your Screen in Firefox
- Click record: Firefox asks you to pick what to share, your whole screen, a window, or a single tab. Grant the permission and recording starts.
- Capture with audio: Add your microphone, and record your camera as an overlay if you want your face in the corner of the video.
- Stop and save: Click stop to get an MP4 file. Download it or share a link, and sign in if you want the recording saved to your library for later.
Video quality depends on your screen resolution and computer, and audio quality depends on your microphone and the room you are recording in. See how we measure accuracy for how ScreenApp tests transcription on the recordings you make here.
Firefox Screen Recorder vs Other Apps
| Feature | ScreenApp | Loom | ScreenDemos | Screencastify | Awesome Screenshot |
|---|---|---|---|---|---|
| Free recording length | Up to 45 minutes | Up to 5 minutes | Not stated for free | Up to 30 minutes | Up to 5 minutes when saved locally |
| Free plan | 2 transcriptions, up to 45 min each | Up to 25 | Not stated | Not stated | Up to 20 stored in the cloud |
| Firefox recording | ✅ In-browser, no extension | Requires the Loom desktop application | Firefox extension required | Not stated | Firefox extension required |
| Watermark on free plan | no watermark on any recording or export | Not stated | Yes, at 720p | Not stated | Not stated |
| Paid plan | $19/month annual | $18/month annual | $15/month | $7/month annual | Not stated |
Sources, checked 2026-09-23: ScreenApp pricing, screenapp.io/help/how-many-minutes-can-i-record, loom.com/pricing, screencastify.com/pricing, support.awesomescreenshot.com/hc/en-us/articles/53666220390425, loom.com/products/firefox-screen-recorder, screendemos.com
- vs Loom: Loom’s Firefox page describes recording through the Loom desktop application, and its free plan caps videos at 5 minutes with a limit of 25 videos. ScreenApp records directly in the Firefox browser tab, with no app to open first.
- vs ScreenDemos: ScreenDemos requires a browser recorder extension even on its free Starter plan, which caps video at 720p and adds a watermark; removing it needs the $15 a month Pro plan. ScreenApp needs no extension and adds no watermark on any plan.
- vs Screencastify: Screencastify limits free recordings to 30 minutes and lists Chrome and Edge extensions on its own site, without stating Firefox support. ScreenApp works the same way in Firefox as it does anywhere else.
- vs Awesome Screenshot: Awesome Screenshot caps a free local recording at 5 minutes and stores up to 20 recordings in the cloud, and it installs as a browser extension. ScreenApp’s free plan covers recordings up to 45 minutes with no extension to add.
Who Uses a Firefox Screen Recorder
Educators and trainers record lessons and demonstrations without asking students to install anything on their own machines first.
Remote teams record project updates and walkthroughs so a colleague in another timezone can watch the video instead of waiting for a live call.
Content creators record software demonstrations and Firefox browser workflows in MP4, without an extension running in the background while they work.
Customer support records the exact steps to fix a problem, so a customer can watch instead of following a written list.
Developers capture bugs and reproduction steps on video, which is often faster to record and clearer to read than a written report.
