Welcome to TSS ( Trade Safe Skins )

We received this information from FireFriendly > backpack.tf
http://psteamcommunity.yuanyoumao.com/groups/meetthestats#announcements/detail/1478727366603990442

Hello Users,

this announcement is a warning that the very popular browser extension Steam Inventory Helper released an update and requested additional permissions that let them see every site you visit and stores all that information. A more detailed explanation about that can be found here (with proof): https://www.reddit.com/r/GlobalOffensive/comments/70xofs/warning_trusted_steam_inventory_helper_now/

We recommend that you remove this extension from your browser right now for your own safety!

More Info:
Initially they circled back and apologised and promised to revert this, but that announcement in their steam group has been deleted since then. Please keep in mind that with those permissions they can do way more than spying on you, that could just be the start. Steam Inventory Helper has been sold 1 year ago by their creators to a cs:go gambling site whom no longer seems to have your best interest at heart.

Stay safe!