1, if you have Firefox, don't bother at all. The advantage of Firefox is that its plug-ins and add-ons are easy to use. There is a component called NetVideoHunter.

2. You can find this in Tools-> Add-ons, search and install it, and you can use it. After the installation is completed, a small picture will be displayed in the lower right corner of the webpage window.

3. Clicking the blue icon will open a window full of multimedia that has been loaded on the page, including music, video and so on.