Well… I’ll be, never really noticed it there. (personally don’t have a use for that one). To make things screwier… Same results with Chrome yet it works in Firefox! 73.0b10 (64-bit) and Pale Moon v28.8.2 (2020-01-28)
HTML Application: 1.8.7 build 966 [202001301235]
UA: Mozilla/5.0 (X11; Linux x86_64; rv:73.0) Gecko/20100101 Firefox/73.0
- Palemoon:
UA: Mozilla/5.0 (X11; Linux x86_64; rv:68.9) Goanna/4.4 PaleMoon/28.8.2
Maybe it improves performance? 
[Apps & Compatible Devices - Tablo TV]
- Not fully supported on all browsers - optimized for Chrome and Safari