What is Firefox Klar for iOS?

Firefox Klar Firefox Klar Last updated: 03/29/2023 100% of users voted this helpful

Take private browsing to the next level. Firefox Klar gives you a dedicated privacy browser with tracking protection and content blocking. You can use Firefox Klar as a standalone browser or as content blocker for Safari on supported iPhone, iPad and iPod touch devices.

Install Firefox Klar

Firefox Klar is available in the App Store for free. When it’s finished downloading, look for the icon on your home screen.

Use Firefox Klar as a browser

Use Firefox Klar as a browser dedicated to your privacy and security. Easily erase your browsing history, passwords, bookmarks and cookies and prevent unwanted ads from following you.

Whenever you want a private tracker-free experience, fire up Firefox Klar. Firefox Klar is easy to use. Just enter your search or website address in the field.


To view a page in regular Firefox or to share it using another app, tap the menu button in the bottom right corner and tap Share Page With....


To erase all information about your session at any time, tap the delete icon in the toolbar.


Use Firefox Klar with Safari

Enjoy protection against ad, social, content or analytics trackers without switching from Safari. Follow these steps to enable Firefox Klar for Safari:

Step one: allow Safari to use content blockers (you only need to do this once):

  1. Tap the Settings app in your iPhone or iPad.
  2. Scroll down to Safari and tap it.
  3. Tap Default Search Browser.
  4. Select Firefox Klar.
  5. Close the Settings app.

Step two: enable Firefox Klar for Safari

  1. Open Firefox Klar.
  2. Tap the menu button in the bottom right corner.
  3. Tap Settings.
  4. Under Safari Integration, tap the switch next to Safari to enable it blue switch.
  5. Close Firefox Klar. You’re ready to browse on Safari!

Customize your Firefox Klar protection settings

Customize the level of content blocking and tracking protection that you need.

Default search engine: to change your default search, see Change the default search in Firefox Klar on iOS.
  1. Open Firefox Klar.
  2. Tap the menu button in the bottom right corner.
  3. Tap Settings.
  4. Under Privacy, tap Tracking Protection.
  5. Tap the switch next to Enhanced Tracking Protection to turn it on or off.
  6. Tap the switch next to each feature to turn it on or off.
    Send anonymous usage data: We use general usage data to help us improve Firefox Klar. You can opt out of this at any time.
  7. Tap the back button or close Firefox Klar. Firefox Klar will save your changes automatically.

How does Firefox Klar work?


Firefox Klar brings added privacy by allowing you to block known website trackers by category:

  • Ads, analytics and social trackers
  • Other content trackers – this category includes embedded videos, photo slideshows, and news article embeds that could track you. Blocking other content trackers may cause many sites to stop functioning properly.
For Tracking Protection, Firefox Klar uses a list provided by Disconnect to identify and block trackers. You can read more about tracking and the standards Disconnect uses to create its list here.


Firefox Klar works by blocking some parts of web pages from loading. With less to download, web pages often load faster with Firefox Klar. Your mobile data usage may also be lower.

  • Web fonts - fonts that are downloaded from the server (may slow down web pages). Web fonts are typefaces used to style the text on some web pages. Blocking Web fonts will alter the appearance of text on any pages where Web fonts are used, but all text will still display legibly.

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