---
title: "Kort vs Firefox: an honest comparison"
canonical: https://kortbrowser.com/vs/firefox
description: "Kort and Firefox side by side: what Kort adds, then engine, platforms, price, ad blocking, cookie pop-ups, usage data and AI. With sources and dates."
updated: 2026-11-01
language: en
---

# Kort vs Firefox

> Kort and Firefox side by side: what Kort adds, then engine, platforms, price, ad blocking, cookie pop-ups, usage data and AI. With sources and dates.

Firefox is made by Mozilla, owned by the non-profit Mozilla Foundation. It runs on its own engine, Gecko.

## Kort adds 12 things

- Apple's WebKit, the engine in Safari
- Native Mac app, written in Swift
- Built-in ad and tracker blocker
- Cookie pop-ups answered for you
- AI Overviews hidden in search
- No usage data, no account
- No AI in the browser
- Vertical tabs and colored Spaces
- Split View, up to four pages
- Pay once, no subscription
- Made in the EU
- Import from Firefox in one step

## Scorecard

|  | Kort | Firefox |
| --- | --- | --- |
| Apple's WebKit engine | Yes | No |
| Ad blocker, built in and on | Yes | No |
| Cookie pop-ups answered | Yes | Not confirmed |
| No usage data sent | Yes | No |
| No account needed | Yes | Yes |
| No AI in the browser | Yes | Partly |
| Vertical tabs and Spaces | Yes | Partly |
| iPhone and iPad app | Coming | Yes |
| Made in the EU | Yes | No |

"Not confirmed" means we could not check it in a primary source. 

Switching: Kort imports your bookmarks, history, open and pinned tabs from Firefox in one step.

## What both have

- Tracking protection on by default.
- Vertical tabs.
- Profiles.
- Separate sign-ins side by side: containers in Firefox, a profile per Space in Kort.
- On-device page translation.
- Firefox add-ons (many work in Kort).

## Side by side

|  | Kort | Firefox |
| --- | --- | --- |
| Engine on Mac | WebKit, Apple's engine (the same as Safari) | Gecko. WebKit on iPhone and iPad |
| Platforms | Mac. iPhone and iPad coming to the App Store | Mac, Windows, Linux, Android, iPhone, iPad |
| Made by | Made in the EU | Mozilla Corporation (owned by the Mozilla Foundation), United States |
| Price and business model | 5 € once, no subscription. One license per iCloud account. | Free. Funded mainly by search partnerships |
| Ad and tracker blocking | Built in and on by default. Blocked inside WebKit before the request is sent. No extension needed | Enhanced Tracking Protection and Total Cookie Protection on by default. No built-in ad blocker |
| Cookie pop-ups | Answered for you: "Reject all" or "Only necessary", or hidden | Not confirmed (last seen: Cookie banner reduction was offered in some regions; Mozilla support now lists it as no longer available) |
| Usage data | None. Crash reports only if you choose to e-mail them | Technical and interaction data on by default, can be turned off |
| Account | None. No sign-in | Not required. Optional Mozilla account for sync |
| AI features | No AI. Google's AI Overviews hidden by default | Opt-in chatbot sidebar and on-device features, with a switch that blocks all AI features |
| Vertical tabs and spaces | Vertical sidebar, Spaces, split view with up to four pages on Mac | Vertical tabs, tab groups, profiles |

Firefox: Gecko, made by Mozilla (United States), on Mac, iPhone, iPad, Windows, Linux, Android. Facts about Firefox checked on 2026-11-01. Kort's price is shown in euros; [every currency](https://kortbrowser.com/pricing.md).

## Questions

### Do Firefox add-ons work in Kort?

Many do. Kort installs add-ons from addons.mozilla.org and shows their permissions first. Add-ons that rely on Firefox-only APIs will not work.

### Why WebKit instead of Firefox?

WebKit is Apple's engine, the one inside Safari. It is built for Apple hardware, light on memory and battery, and patched with macOS.

### Can I import from Firefox?

Yes. On the Mac, Kort imports bookmarks, history, open and pinned tabs, tab groups and saved addresses from Firefox, in one step.

## Sources

- <https://www.mozilla.org/firefox/> (as of 2026-11-01)
- <https://foundation.mozilla.org/en/who-we-are/public-records/> (as of 2026-11-01)
- <https://support.mozilla.org/kb/enhanced-tracking-protection-firefox-desktop> (as of 2026-11-01)
- <https://support.mozilla.org/kb/cookie-banner-reduction> (as of 2026-11-01)
- <https://www.mozilla.org/privacy/firefox/> (as of 2026-11-01)
- <https://www.thurrott.com/a-i/330971/mozilla-firefox-to-get-new-ai-feature-in-2026-with-a-kill-switch> (as of 2026-11-01)
- <https://www.mozilla.org/firefox/releases/> (as of 2026-11-01)

We describe other browsers from their own pages, help centers, app store listings and press coverage. Products change. If something here is out of date, write to us and we will fix it.