My cable TV provider (ZIGGO, Netherlands) offers an extra service which makes it possible to watch TV with a normal browser, in my case FireFox 109.0 64b. You can watch 'live' and watch recent programs. Playing live gives only few amounts of harddisk write access. However (!!!) when I playback a recent program, Firefox writes 55 Mbyte/s to 2 caches on ..\AppData\Roaming\Mozilla and ..\AppData\Local\Mozilla. I was stupified when I discovered that 3 hours of watching recent programs wrote 1700 GB (1.7 TB) to my SSD by FireFox (according to Windows 10 Task Manager). This data is produced by FireFox since my 30 days usage of internet was only 30GB. I assume FireFox writes decompressed video to cache or something. I made a temporary fix by using symbolic links from ..\AppData to an old fashioned harddisk, which has a hard time writing, when looking "non live". I looked if ZIGGO installed some kind of plugin, but could not find it.