Applies Arkenfox v91..v102 migration

> **WORK IN PROGRESS FOR ESR 102 : DO NOT USE IT AS IS**

Migration status :
    * updated README
    * updated header
    * updated index
    * updated sections

README.md

@@ -2,18 +2,17 @@
 
 > Thunderbird privacy, security and anti-fingerprinting: a comprehensive user.js template for configuration and hardening
 
-### :purple_square: user.js
+### 🟪 user.js
 
-An `user.js` is a configuration file that can control hundreds of Thunderbird settings.  
-For a more technical breakdown and explanation, you can read more on the [overview](https://github.com/HorlogeSkynet/thunderbird-user.js/wiki/1.1-Overview) Wiki page.
+An `user.js` is a configuration file that can control Thunderbird settings - for a more technical breakdown and explanation, you can read more in the [wiki](https://github.com/HorlogeSkynet/thunderbird-user.js/wiki/1.1-Overview).
 
-### :green_square: Thunderbird user.js
+### 🟩 Thunderbird user.js
 
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 
 The `thunderbird user.js` is a **template** which aims to provide as much privacy and enhanced security as possible, and to reduce tracking and fingerprinting as much as possible - while minimizing any loss of functionality and breakage (but it will happen).
 
-Everyone, experts included, should at least read the [implementation](https://github.com/HorlogeSkynet/thunderbird-user.js/wiki/1.3-Implementation) wiki page.
+Everyone, experts included, should at least read the [wiki](https://github.com/HorlogeSkynet/thunderbird-user.js/wiki), as it contains important information regarding a few `user.js` settings.
 
 It differs from the `arkenfox user.js` in that the focus is to keep Thunderbird as an **e-mail client** and disable as many web browsing features as possible. We believe web browsing should be done in a web browser, and not an email client.
 
@@ -22,23 +21,22 @@ It differs from the `arkenfox user.js` in that the focus is to keep Thunderbird
 - For information about [extensions](https://github.com/HorlogeSkynet/thunderbird-user.js/wiki/4.1-Extensions), see the Wiki.
 - **Calendar** users should [see this page](https://github.com/HorlogeSkynet/thunderbird-user.js/wiki/4.1.1-Calendar).
 
-Also be aware that this `user.js` is made specifically for Thunderbird and has only been tested in the latest stable release.
+Also be aware that this `user.js` is made specifically for Thunderbird and is only being tested against releases with extended support (ESR).
 
-### :orange_square: Sitemap
+### 🟧 Sitemap
 
 - [Releases](https://github.com/HorlogeSkynet/thunderbird-user.js/releases)
 - [Issues](https://github.com/HorlogeSkynet/thunderbird-user.js/issues)
 - [Wiki](https://github.com/HorlogeSkynet/thunderbird-user.js/wiki)
 
-### :red_square: Acknowledgments
+### 🟥 Acknowledgments
 
 * @tya99 most of the ground work and initial port from the Firefox version of [arkenfox user.js](https://github.com/arkenfox/user.js)
 * [@dngray](https://github.com/dngray) continual maintenance and Wiki
 * [@HorlogeSkynet](https://github.com/HorlogeSkynet) continual maintenance
 
-### :blue_square: Related Projects
+### 🟦 Related Projects
 
 * [Privacy Handbuch](https://www.privacy-handbuch.de/handbuch_31p.htm)
 * [Privacy Haters](http://r-36.net/scm/privacy-haters/file/README.md.html)
 * [12bytes.org's user-overrides.js](https://codeberg.org/12bytes.org/thunderbird-user.js-supplement)
-* ~~CHEF-KOCH/TBCK~~