How to Clear & Delete Cookies on Mozilla Firefox: Desktop, Android, iOS

If you’re looking to clear or delete cookies on Mozilla Firefox, whether on your Windows or Mac computer, your Android or iOS mobile device, or just targeting specific sites, this guide is for you.

Just follow the steps outlined here for the device or browser setup you’re using.

You also have the option to clear cookies for a specific site or choose to only clear cookies for a certain timeframe, from the last hour up to “All time”. This means you will clear any cookie stored in Firefox during that period.

Clear Cookies on Firefox – Windows & Mac

To clear Firefox cookies on your Windows or Mac computer, you can use the Firefox Options menu.

Using Firefox Options

  1. Launch Mozilla Firefox on your computer.
  2. Click on the three horizontal lines in the upper-right corner of the browser window to open the menu.
  3. Depending on your operating system and browser version, select “Options,” “Preferences,” or “Settings.” This menu item might vary:
    • Windows: Usually labeled as “Options” 
    • Mac: Typically called “Preferences” or “Settings.”
  1. In the left sidebar, click on “Privacy and Security.”
  2. Scroll down and click on “Clear Data…”
  1. Select Time Range:
    • In the pop-up window, choose the time range for which you want to clear cookies. To delete all cookies, select “Everything.”
  2. Select Data to Clear:
    • Check the box next to “Cookies and Site Data.” You can also select other types of data you want to clear, such as browsing history or cached images and files.
  3. Click on the “Clear” button.

Deleting Cookies on Firefox for One Site

If you don’t want to clear all your Firefox cookies, you can delete cookies specifically for one site.

  1. Launch Mozilla Firefox on your computer.
  2. Click on the three horizontal lines to open the menu.
  3. Navigate to “Options,” then “Privacy & Security.”
  4. Under “Cookies and Site Data,” click on “Manage Data…”
  5. Find the site whose cookies you want to clear and click on it.
  6. Click “Remove Selected” to delete cookies for the chosen site.

Clear & Delete Firefox Cookies on Android & iOS

The process to clear cookies in Mozilla Firefox on mobile devices is straightforward and similar for both Android and iOS.

  1. Launch the Mozilla Firefox app on your mobile device.
  2. Tap on the menu:
    • Android: three vertical dots in the upper-right corner.
    • iOS: three horizontal dots in the lower-right corner.
  3. Select “Settings.”
  4. Tap on “Privacy.”
  5. Tap on “Clear browsing data” .
  6. Choose the time range for which you want to clear cookies. To delete all cookies, select “Everything” on Android or your preferred option on iOS.
  7. Ensure that “Cookies and site data” is checked. You can also select other types of data you want to clear.
  8. Clear the data:
    • Android: Tap on the “Clear data” button.
    • iOS: Tap “Clear Browsing Data” at the bottom of the screen and confirm by tapping again in the pop-up window.