1. WhatFont The plugin allows you to get the name of any font on the page.
2. Colorzilla
The extension allows you to get color from anywhere on the site and use it in other programs.
3. OneTab
Add-on allows you to group tabs using folders.
four. HTTPS Everywhere
Enforces HTTPS on any site to ensure a secure connection.
5. Dark Reader
Forced recoloring of any page in dark colors.