You might have an unwanted add-on.

You can view, disable, and often remove unwanted or unknown extensions on the Add-ons page. Either:

• Ctrl+Shift+a (Mac: Command+Shift+a)
• "3-bar" menu button (or Tools menu) > Add-ons
• type or paste about:addons in the address bar and press Enter/Return

In the left column of the Add-ons page, click Extensions. On the right side, find the "Manage Your Extensions" heading.

If there is at least one extension before the next heading -- "Recommended Extensions" -- please continue:

Then cast a critical eye over the list below that heading. Any extensions Firefox installs for built-in features are hidden from this page, so everything listed here is your choice (and your responsibility) to manage. Anything suspicious or that you just do not remember installing or why? If in doubt, disable (or remove). For your privacy and security, don't let mystery programs linger here.

Any improvement?

Note: Some extensions interfere with access to the Extensions list. In that case:

Put Firefox in its Safe/Troubleshoot Mode first, since that temporarily deactivates extensions. Here's how:

If Firefox is running:

You can restart Firefox in Safe/Troubleshoot Mode using either:

• "3-bar" menu button > Help > Troubleshoot Mode... (before Fx88: Restart with Add-ons Disabled)
• (menu bar) Help menu > Troubleshoot Mode... (before Fx88: Restart with Add-ons Disabled)

and OK the restart. A small dialog should appear. Click the Open button (before Fx88: "Start in Safe Mode" button).

If Firefox is not running:

Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.) A small dialog should appear. Click the Open button (before Fx88: "Start in Safe Mode" button).

Note: Don't use the Refresh without first reviewing this article to understand what will be deleted: Refresh Firefox - reset add-ons and settings.

Can you rid yourself of the unwanted PDF Hub?

Note: after removing an extension, your home page and default search engine sometimes need to be updated. These articles have those next steps:

• How to set the home page
• Change your default search settings in Firefox

I tried to follow your instructions but I am afraid that I did not accomplish that task. I am 80 years old and live alone and not very computer savvy! PLEASE help me!! I just want to cancel this! I live on a fixed income and cannot afford this!! I just want to remove the PDF hub and would be eternally grateful for the assistance! Sincerely, Barbara Tarpley

Hi Barbara, it's challenging because you are our eyes and hands for solving this issue; we don't take remote control of your computer.

Could you use the free version of Malwarebytes Anti-Malware to scan your system and clean out as much of the program as possible. There's a link in the following support article:

Troubleshoot Firefox issues caused by malware

After that, we can return to your Firefox settings and see what more is needed to clean them up. You might be able to skip to fixing your home page and default search site. These articles have the steps:

• How to set the home page
• Change your default search settings in Firefox

By the way, did you give someone money related to PDF Hub? You may need to call your credit card issuer or bank to cancel that if the company won't cancel and give you your money back.