First open the settings of Firefox browser
Then click on add-ons
Get add-ons
Search NetVideoHunter, install
After the installation is complete, click on Add-ons-->Extensions--> the option of NetVideoHunter again
Modify its settings to the following
Click ok
Then a blue icon will appear in the upper left corner of the browser
Then you can open the video or game, click the blue button,
There will be an option for you to open the page, check the column you want
Click to download, the swf file is saved, you can check my download for the specific save address