Here are the steps:
1. Open your Mozilla Firefox browser.
2. Open the add-ons link below and install on your firefox.
- Https: / / addons.mozilla.org/en-US/firefox/addon/2108
3. Once installed, restart your firefox.
4. Then go to the link below:
- Http://userstyles.org/styles/9405
5. Click the button "Install with Stylish". Situated on the top right corner.
6. Once installed, restart your firefox again.
7. Go to facebook and login with your account.
8. Try to go to your profile page, the ad on facebook you will be lost.
To display your ad longer live there remove the check mark to selection add-ons are located at the bottom right corner of your firefox, and vice versa.
For more details you can see the image below:
Facebook Ads Remover