Wrong home page opens when I start Firefox - How to fix
Mac and Linux users: This article applies to Windows only.
Some third-party software providers might change Firefox's shortcut so that the browser always opens their page. To prevent this from happening, make sure you decline any options to set your site preferences when installing or updating a third-party application.
Right-click on the Firefox icon on your desktop or task bar, then click on Properties.
In the Target: field, you'll see the web address that the software provider keeps telling Firefox to load when you open the browser (for example, "http://bitable.com"). Delete that web address and click OK to save your changes: