Why does Firefox open so slowly?

The slow opening of Firefox web pages is caused by too much junk in the browser. The solution is:

1. Click on the lower left corner of the computer to open the Windows system → Control Panel.

2. Next, you need to click Network and Internet on the pop-up page.

3. Then click Delete Browsing History and cookie.

4. Next, you need to click the delete option in "General", as shown in the figure.

5. Select the cleaning option in the window. Usually, select temporary files, Cookie, and history, and then click Delete.