Misabel for Chrome [380 KB] Wion 7 - Win 10 Freeware (1-21) - gives instant price comparisons and price history charts http://home.misabel.ai/plugin/
Opera GX [89.5 MB] Win 7 - Win 10 Freeware (1-21) - lets you set limits on how much RAM, CPU, and network usage your browser takes up https://www.opera.com/gx
W10Privacy [2.4 MB] Win 10 Freeware - can display typical Windows 10 security settings that can be activated and deactivated within the program https://www.majorgeeks.com/files/details/w10privacy.html