Enable the browser toolbox to inspect FIrefox itself

Maybe I'll want to do this one day

Great extension for vertical tabs with high customization.

My sidebery style:

#root.root {--tabs-indent: 16px;}

/* No empty space after last tabs */
.TabsPanel .bottom-space {
    height: 0
}

/* The spaces in the navigation bar take a whole line. It forces a line return */
.NavigationBar .nav-item[data-class="space"][data-type="dynamic"] {
//  height: 8px;
    height: 0;
    width: 100% !important;
}

/* The delimiters are horizontal now and force a line return */
.NavigationBar.-top .nav-item[data-class="space"][data-type="static"] {
    height: 8px;
    width: 100% !important;
}
.NavigationBar.-top .nav-item[data-class="space"][data-type="static"]::after {
    height: 1px;
    width: 100%;
    top: auto;
    left: auto;
    background-color: #75747A;
}

/* Moving Sidebery navigation bar to bottom, to mimic how Space works on Arc Browser. Make sure to choose Horizontal when activating the navigation bar. */
.top-horizontal-box {
  display: flex;
  order: 10; 
}
#search_bar {
    order: 5;
}

/* A bottom border on the pinned tabs bar */
.PinnedTabsBar {
     border-bottom: 1px solid #75747A;
}

.Tab .title {
    font-size: 12px;
    font-family: unset;
}

/* OLD STYLES
#root.root {--tabs-indent: 16px;}

/* No empty space after last tabs */
.TabsPanel .bottom-space {
    height: 0
}

/* The spaces in the navigation bar take a whole line. It forces a line return */
.NavigationBar .nav-item[data-class="space"][data-type="dynamic"] {
//  height: 8px;
    height: 0;
    width: 100% !important;
}

/* The delimiters are horizontal now and force a line return */
.NavigationBar.-top .nav-item[data-class="space"][data-type="static"] {
    height: 8px;
    width: 100% !important;
}
.NavigationBar.-top .nav-item[data-class="space"][data-type="static"]::after {
    height: 1px;
    width: 100%;
    top: auto;
    left: auto;
    background-color: #75747A;
}

/* Moving Sidebery navigation bar to bottom, to mimic how Space works on Arc Browser. Make sure to choose Horizontal when activating the navigation bar. */
.top-horizontal-box {
  display: flex;
  order: 10; 
}
#search_bar {
    order: 5;
}

/* A bottom border on the pinned tabs bar */
.PinnedTabsBar {
     border-bottom: 1px solid #75747A;
}

.Tab .title {
    font-size: 12px;
    font-family: unset;
}
*/

For user chrome, you need to set to true this flag toolkit.legacyUserProfileCustomizations.stylesheets in about:config

Then create chrome/userChrome.css in your profile. You can find it with about:profiles

My user chrome:

/* Hide the "Tree Style Tab" header at the top of the sidebar */
#sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"] #sidebar-header,
/* Hide the "Sidebery" header at the top of the sidebar */
#sidebar-box[sidebarcommand="_3c078156-979c-498b-8990-85f7987dd929_-sidebar-action"] #sidebar-header {
  display: none;
}

/* https://jahed.dev/2021/10/08/compacting-firefox-layout-with-sidebery-and-user-chrome/ */
#main-window[titlepreface*="[Sidebery]"] #navigator-toolbox {
  /* --toolbar-bgcolor: #1C1B22; */
  --toolbar-bgcolor: #000;
  background-color: var(--toolbar-bgcolor) !important;
  display: flex !important;
  /* flex-direction: row; */
  flex-direction: row-reverse;
}

#main-window[titlepreface*="[Sidebery]"] #TabsToolbar .titlebar-spacer,
#main-window[titlepreface*="[Sidebery]"] #TabsToolbar .toolbar-items {
  display: none !important;
}

#main-window[titlepreface*="[Sidebery]"] #TabsToolbar {
  /* #main-window[titlepreface*="[Sidebery]"] #TabsToolbar .titlebar-buttonbox { */
  /* margin-left: 12px !important; */
  /* margin-right: 12px !important; */
  max-width: fit-content;
}

#main-window[titlepreface*="[Sidebery]"] #nav-bar {
  flex-grow: 1 !important;
}

#sidebar-splitter {
  --sidebar-border-color: var(--chrome-content-separator-color);
  width: 4px !important;
  background-color: transparent !important;
  margin-inline-start: -4px !important;
  border: 0 !important;
}

#urlbar-background {
  --toolbar-field-border-color: transparent;
  --toolbar-field-background-color: transparent;
  --toolbar-field-focus-border-color: #a86595;
  --toolbar-field-focus-background-color: var(--toolbar-bgcolor);
  --arrowpanel-border-color: #a86595;
}

#main-window[titlepreface*="[Sidebery]"] #titlebar {
  flex-direction: row;
  order: 1;
}

#main-window[titlepreface*="[Sidebery]"] #PersonalToolbar {
  flex-direction: row;
  order: 2;
}

#main-window[titlepreface*="[Sidebery]"] #toolbar-menubar[inactive] {
  display: none;
}

/* Put the settings button on the left */
#PanelUI-button {
  order: -1;
  padding-inline-end: var(--toolbarbutton-outer-padding);
}

#main-window[titlepreface*="[Sidebery]"] #nav-bar-customization-target {
  padding-inline-end: var(--toolbar-start-end-padding);
}

/* No floating tabs */
.tab-background {
  /* border-radius: 0px 0px !important; */
  margin-bottom: 0px !important;
  border-bottom-right-radius: 0 !important;
  border-bottom-left-radius: 0 !important;
}

/* Don't show the space on the left when you're in windowed mode */
.titlebar-spacer[type="pre-tabs"] {
  display: none;
}

/* Hide the private browsing label */
#private-browsing-indicator-with-label label {
  display: none;
}

/* Remove the down arrow button */
#alltabs-button {
  display: none;
}

/* Remove the space to the right of the tabs */
.titlebar-spacer[type="post-tabs"] {
  display: none;
}

/* Hide Firefox View */
#firefox-view-button {
  display: none;
}
#tabbrowser-tabs {
  border-inline-start: 0 !important;
  margin-inline-start: 0 !important;
  padding-inline-start: 0 !important;
}
.tabbrowser-tab:first-child {
  padding-left: 0 !important;
}

#main-window[titlepreface*="[Sidebery]"] .browser-toolbar:not(.browser-titlebar) {
  background-color: transparent !important;
}

Email temporaires par Mozilla

Ma config de firefox

Comment activer le chiffrement SNI: https://korben.info/comment-activer-le-chiffrement-sni-encrypted-sni.html
La liste des fournisseurs (sérieux) de DNS compatibles DNS-over-HTTPS (DoH): https://korben.info/la-liste-des-fournisseurs-serieux-de-dns-compatibles-dns-over-https-doh.html
Browsing Experience Security Check: https://www.cloudflare.com/ssl/encrypted-sni/

https://techdows.com/2016/03/disable-vivaldi-notifications.html
chrome://settings/content/notifications

localisation:
vivaldi://settings/content/location

Permet de changer automatiquement les CSS des pages Web, donc d'avoir potentiellement des dark mode un peu sur tous les sites et peu même modifier le navigateur

Permet de réduire la consommation de Firefox lorsqu'il est réduit dans la barre des tâches

L'emplacement du fichier:

http://kb.mozillazine.org/index.php?title=UserChrome.css

Permet de désactiver Pocket dans Firefox