Do you ever visit a website and wish you could just tell it to stop tracking you or storing data?
While clearing your browser's cookies might seem like the only option, there's a more targeted approach.
Firefox allows you to block cookies and site data for a specific website without affecting your experience on other sites.
This is a powerful way to manage cookies, improve your privacy, and take control of your Browse data.
Block Cookies And Site Data For Specific Site In Firefox
Cookies and site data are an essential part of the modern web, but they can also be used for extensive tracking.
While most cookies are harmless, others are used by advertisers to follow your Browse activity across different websites.
This is often the reason you see personalized ads that feel a little too specific. Blocking cookies for a particular site is a proactive step to:
- Enhance Your Privacy: It prevents a site from building a detailed profile of your online behavior.
- Limit Tracking: It stops the website and its third-party advertisers from following your movements.
- Prevent Unwanted Pop-ups: Some websites use cookies to track your interactions, leading to repetitive pop-ups or messages.
Method 1: Blocking Website's Cookies And Site Data
The most effective way to manage a site's data in Firefox is to use the built-in "Exceptions" list. This feature allows you to permanently block a specific website's ability to store cookies and site data.
Step 1: Open Firefox Settings
- Open your Firefox browser.
- Click the "Open menu" icon (three horizontal lines) in the top-right corner.
- From the dropdown menu, select "Settings."
Step 2: Navigate To Privacy & Security
- In the Settings tab, click "Privacy & Security" from the left-hand menu.
- Scroll down the page until you find the "Cookies and Site Data" section.
Step 3: Add Website To Exceptions List
- Click the "Manage Exceptions..." button. A new window will pop up.
- In the "Address of website" field, type or paste the exact URL of the website you want to block.
- Click the "Block" button.
- Finally, click "Save Changes" to finalize the process.
NOTE: For example, if you want to block Harvard Business Review site.
Then type: https://hbr.org
Next click on the "Block" button.
You can see Harvard Business Review domain listed under "Website" and its "Status" as "Block".
Finally click the "Save Changes" button.
That's all you need to do.
Once you’ve saved the changes, Firefox will no longer accept cookies or store site data from that specific website, helping to protect your privacy.
Method 2: Block Cookie-Setting Scripts Using uBlock Origin
Do you want more control?
Use the uBlock Origin extension to block the scripts and trackers that typically set cookies — especially third-party cookies.
Step-by-Step Using uBlock Origin:
1. Install uBlock Origin from the Firefox Add-ons store.
2. Visit the website you want to restrict.
3. Click the uBlock Origin icon in the toolbar.
4. Click the “>>” (matrix icon) to open the dynamic filtering panel.
5. Set the following to red (blocked):
- 3rd-party scripts
- 3rd-party frames
- Optionally, block 1st-party scripts (if you want full blocking)
6. Click the padlock icon to save your settings for that site.
This method prevents cookie-setting scripts from loading, blocking most trackers and ad technologies from dropping cookies in the first place.
Method 3: Use Privacy Filter Lists In uBlock Origin
You can also enable uBlock Origin extension pre-built filter lists that block known cookie trackers and annoying consent banners:
How to Enable Privacy Filters:
1. Click the uBlock Origin icon → click Settings (gear icon).
2. Go to the Filter Lists tab.
3. Enable:
✅ EasyPrivacy
✅ Fanboy’s Annoyance List
✅ uBlock Filters – Privacy
4. Click Apply Changes
These filters automatically block cookie-related trackers and scripts across thousands of sites — no extra work needed.
Conclusion: How To Block Cookies And Take Back Control
Taking control of your browser's cookie settings is a simple yet powerful way to enhance your online privacy.
By using Firefox's "Manage Exceptions" feature, you can block any website you choose without affecting your Browse experience elsewhere.
This method is safe, effective, and gives you the peace of mind that comes with knowing you've limited unwanted tracking.
Firefox Cookies And Site Data Frequently Asked Questions
Q1: What happens if I block a website's cookies?
Blocking a website's cookies means it won't remember your login status, preferences, or other settings. While this is good for privacy, it can also cause the website to function incorrectly until you allow cookies again.
Q2: Can I block cookies for multiple websites at once?
Yes, you can add as many websites to the "Manage Exceptions" list as you need. Just repeat the process for each site. There is no limit to how many you can block.
Q3: Is it better to block cookies or just clear them all the time?
Blocking cookies for specific sites is a more targeted and permanent solution. Clearing cookies is a temporary fix that can be inconvenient, as it logs you out of all your accounts and erases your saved preferences across all sites.
Q4: Does blocking cookies stop all forms of online tracking?
No, blocking cookies is a major step, but some websites and advertisers use other methods of tracking, such as browser fingerprinting. For more comprehensive privacy, consider using a more powerful browser extension or a VPN.
👉 Here are more tips how to block cookies and site data in Firefox.