Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 1686 insertions, 0 deletions

diff --git a/toolkit/themes/shared/in-content/common-shared.css b/toolkit/themes/shared/in-content/common-shared.css
new file mode 100644
index 0000000000..a25cfda112
--- /dev/null
+++ b/toolkit/themes/shared/in-content/common-shared.css
@@ -0,0 +1,1474 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+@import url("chrome://global/skin/design-tokens-brand.css");
+
+@namespace html "http://www.w3.org/1999/xhtml";
+@namespace xul "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
+
+:host,
+:root {
+  --in-content-page-color: rgb(21, 20, 26);
+  --in-content-page-background: #fff;
+  --in-content-text-color: var(--in-content-page-color);
+  --in-content-box-background: #fff;
+  --in-content-box-background-odd: rgba(12, 12, 13, 0.05); /* grey 90 a05 */
+  --in-content-box-border-color: color-mix(in srgb, currentColor 41%, transparent);
+  --in-content-box-info-background: #f0f0f4;
+  --in-content-item-hover: color-mix(in srgb, var(--in-content-primary-button-background) 20%, transparent);
+  --in-content-item-hover-text: var(--in-content-page-color);
+  --in-content-item-selected: var(--in-content-primary-button-background);
+  --in-content-item-selected-text: var(--in-content-primary-button-text-color);
+  --in-content-icon-color: rgb(91,91,102);
+  --in-content-accent-color: var(--in-content-primary-button-background);
+  --in-content-accent-color-active: var(--in-content-primary-button-background-hover);
+  --in-content-border-hover: var(--grey-90-a50);
+  --in-content-border-invalid: var(--red-50);
+  --in-content-border-color: #d7d7db;
+  --in-content-error-text-color: #c50042;
+  --in-content-success-icon-color: #2ac3a2;
+  --in-content-link-color: var(--in-content-primary-button-background);
+  --in-content-link-color-hover: var(--in-content-primary-button-background-hover);
+  --in-content-link-color-active: var(--in-content-primary-button-background-active);
+  --in-content-link-color-visited: var(--in-content-link-color);
+  --in-content-button-text-color: var(--in-content-text-color);
+  --in-content-button-text-color-hover: var(--in-content-text-color);
+  --in-content-button-text-color-active: var(--in-content-button-text-color-hover);
+   /* button background states are also used for checkboxes and radiobuttons */
+  --in-content-button-background: color-mix(in srgb, currentColor 7%, transparent);
+  --in-content-button-background-hover: color-mix(in srgb, currentColor 14%, transparent);
+  --in-content-button-background-active: color-mix(in srgb, currentColor 21%, transparent);
+  --in-content-button-border-color: transparent;
+  --in-content-button-border-color-hover: transparent;
+  --in-content-button-border-color-active: var(--in-content-button-border-color-hover);
+  --in-content-primary-button-text-color: rgb(251,251,254);
+  --in-content-primary-button-text-color-hover: var(--in-content-primary-button-text-color);
+  --in-content-primary-button-text-color-active: var(--in-content-primary-button-text-color);
+  --in-content-primary-button-background: #0061e0;
+  --in-content-primary-button-background-hover: #0250bb;
+  --in-content-primary-button-background-active: #053e94;
+  --in-content-primary-button-border-color: transparent;
+  --in-content-primary-button-border-hover: transparent;
+  --in-content-primary-button-border-active: transparent;
+  --in-content-danger-button-background: #e22850;
+  --in-content-danger-button-background-hover: #c50042;
+  --in-content-danger-button-background-active: #810220;
+  --in-content-focus-outline-color: var(--focus-outline-color);
+  --in-content-focus-outline-width: var(--focus-outline-width);
+  --in-content-focus-outline-offset: var(--focus-outline-offset);
+  --in-content-focus-outline-inset: var(--focus-outline-inset);
+  --in-content-focus-outline: var(--focus-outline);
+
+  --in-content-table-background: #f8f8fa;
+  --in-content-table-border-color: var(--in-content-box-border-color);
+  --in-content-table-header-background: var(--in-content-primary-button-background);
+  --in-content-table-header-color: var(--in-content-primary-button-text-color);
+  --in-content-sidebar-width: 240px;
+
+  --dialog-warning-text-color: var(--red-60);
+
+  --checkbox-border-color: var(--in-content-box-border-color);
+  --checkbox-unchecked-bgcolor: var(--in-content-button-background);
+  --checkbox-unchecked-hover-bgcolor: var(--in-content-button-background-hover);
+  --checkbox-unchecked-active-bgcolor: var(--in-content-button-background-active);
+  --checkbox-checked-bgcolor: var(--in-content-primary-button-background);
+  --checkbox-checked-color: var(--in-content-primary-button-text-color);
+  --checkbox-checked-border-color: transparent;
+  --checkbox-checked-hover-bgcolor: var(--in-content-primary-button-background-hover);
+  --checkbox-checked-active-bgcolor: var(--in-content-primary-button-background-active);
+
+  --blue-40: #45a1ff;
+  --blue-50: #0a84ff;
+  --blue-60: #0060df;
+  --grey-30: #d7d7db;
+  --grey-60: #4a4a4f;
+  --grey-90-a10: rgba(12, 12, 13, 0.1);
+  --grey-90-a20: rgba(12, 12, 13, 0.2);
+  --grey-90-a30: rgba(12, 12, 13, 0.3);
+  --grey-90-a50: rgba(12, 12, 13, 0.5);
+  --grey-90-a60: rgba(12, 12, 13, 0.6);
+  --green-50: #30e60b;
+  --green-60: #12bc00;
+  --green-70: #058b00;
+  --green-80: #006504;
+  --green-90: #003706;
+  --orange-50: #ff9400;
+  --red-40: #ff4f5e;
+  --red-50: #ff0039;
+  --red-60: #d70022;
+  --red-70: #a4000f;
+  --red-80: #5a0002;
+  --red-90: #3e0200;
+  --yellow-50: #ffe900;
+  --yellow-60: #d7b600;
+  --yellow-60-a30: rgba(215, 182, 0, 0.3);
+  --yellow-70: #a47f00;
+  --yellow-80: #715100;
+  --yellow-90: #3e2800;
+
+  --shadow-10: 0 1px 4px var(--grey-90-a10);
+  --shadow-30: 0 4px 16px var(--grey-90-a10);
+
+  --card-padding: 16px;
+  --card-shadow: var(--shadow-10);
+  --card-outline-color: var(--grey-30);
+  --card-shadow-hover: var(--card-shadow), 0 0 0 5px var(--card-outline-color);
+
+  accent-color: var(--in-content-accent-color);
+  color-scheme: light dark;
+}
+
+@media (prefers-color-scheme: dark) {
+  :host,
+  :root {
+    /* Keep these in sync with:
+     *
+     *  * nsXPLookAndFeel::GenericDarkColor
+     *  * The default value of browser.display.foreground_color.dark and
+     *    browser.display.background_color.dark
+     *
+     * TODO (emilio): Once color-scheme support is complete, perhaps we can
+     * just replace most of these for system colors and remove all this
+     * duplication (assuming we honor the preferred color scheme for
+     * in-content privileged pages and plain-text documents). */
+    --in-content-page-background: rgb(28,27,34);
+    --in-content-page-color: rgb(251,251,254);
+
+    --in-content-box-background: rgb(35, 34, 43);
+    --in-content-box-background-odd: rgba(249,249,250,0.05);
+    --in-content-box-info-background: rgba(249,249,250,0.15);
+
+    --in-content-border-color: rgba(249,249,250,0.2);
+    --in-content-border-hover: rgba(249,249,250,0.3);
+    --in-content-border-invalid: rgb(255,132,139);
+
+    --in-content-error-text-color: #FF9AA2;
+    --in-content-success-icon-color: #54FFBD;
+
+    --in-content-icon-color: rgb(251,251,254);
+
+    --in-content-primary-button-text-color: rgb(43,42,51);
+    --in-content-primary-button-background: rgb(0,221,255);
+    --in-content-primary-button-background-hover: rgb(128,235,255);
+    --in-content-primary-button-background-active: rgb(170,242,255);
+
+    --in-content-danger-button-background: #ff848b;
+    --in-content-danger-button-background-hover: #ffbdc5;
+    --in-content-danger-button-background-active: #ffdfe7;
+
+    --in-content-table-background: rgb(35, 34, 43);
+
+    --card-outline-color: var(--grey-60);
+
+    --dialog-warning-text-color: var(--red-40);
+
+    scrollbar-color: rgba(249,249,250,.4) rgba(20,20,25,.3);
+  }
+
+  /* For dialogs, use a different background colour. We don't do
+   * this in High Contrast mode, as we should be using system colours then.
+   */
+  @media not (prefers-contrast) {
+    :root[dialogroot],
+    /* Also need this on dialog :hosts, or the rule above will override the
+     * value for this custom property again in the shadow DOM. */
+    :host(dialog) {
+      --in-content-page-background: #42414d;
+    }
+  }
+}
+
+@media (prefers-contrast) {
+  :host,
+  :root {
+    --in-content-page-color: CanvasText;
+    --in-content-page-background: Canvas;
+
+    --in-content-box-background: -moz-Dialog;
+    --in-content-box-background-odd: -moz-Dialog;
+    --in-content-box-border-color: -moz-DialogText;
+    --in-content-box-info-background: -moz-Dialog;
+
+    --in-content-item-hover: SelectedItem;
+    --in-content-item-hover-text: SelectedItemText;
+    --in-content-item-selected: SelectedItem;
+    --in-content-item-selected-text: SelectedItemText;
+    --in-content-icon-color: -moz-DialogText;
+
+    --in-content-accent-color: SelectedItem;
+    --in-content-accent-color-active: SelectedItem;
+
+    --in-content-border-hover: ThreeDShadow;
+    /* This is not great, but there is no suitable keyword for this.
+     * In theory, we shouldn't be conveying invalid state just with a colour
+     * change... */
+    --in-content-border-invalid: ThreeDShadow;
+    --in-content-border-color: ThreeDShadow;
+
+    --in-content-link-color: -moz-nativehyperlinktext;
+    --in-content-link-color-hover: -moz-nativehyperlinktext;
+    --in-content-link-color-active: -moz-nativehyperlinktext;
+    --in-content-link-color-visited: -moz-nativehyperlinktext;
+
+    --in-content-button-text-color: ButtonText;
+    --in-content-button-text-color-hover: SelectedItemText;
+    --in-content-button-text-color-active: SelectedItem;
+    --in-content-button-background: ButtonFace;
+    --in-content-button-background-hover: SelectedItem;
+    --in-content-button-background-active: SelectedItemText;
+    --in-content-button-border-color: ButtonText;
+    --in-content-button-border-color-hover: SelectedItemText;
+    --in-content-button-border-color-active: SelectedItem;
+
+    --in-content-primary-button-text-color: ButtonFace;
+    --in-content-primary-button-text-color-hover: SelectedItemText;
+    --in-content-primary-button-text-color-active: SelectedItem;
+    --in-content-primary-button-background: ButtonText;
+    --in-content-primary-button-background-hover: SelectedItem;
+    --in-content-primary-button-background-active: SelectedItemText;
+    --in-content-primary-button-border-color: ButtonFace;
+    --in-content-primary-button-border-hover: SelectedItemText;
+    --in-content-primary-button-border-active: SelectedItem;
+
+    --in-content-danger-button-background: var(--in-content-primary-button-background);
+    --in-content-danger-button-background-hover: var(--in-content-primary-button-background-hover);
+    --in-content-danger-button-background-active: var(--in-content-primary-button-background-active);
+
+    --in-content-focus-outline-color: -moz-DialogText;
+
+    --in-content-table-border-color: ThreeDDarkShadow;
+    --in-content-table-background: -moz-Dialog;
+    --in-content-table-header-background: -moz-Dialog;
+    --in-content-table-header-color: -moz-DialogText;
+
+    --dialog-warning-text-color: -moz-FieldText;
+
+    --checkbox-border-color: ThreeDShadow;
+    --checkbox-unchecked-bgcolor: -moz-Field;
+    --checkbox-unchecked-hover-bgcolor: -moz-Field;
+    --checkbox-unchecked-active-bgcolor: -moz-Field;
+    --checkbox-checked-bgcolor: SelectedItem;
+    --checkbox-checked-color: SelectedItemText;
+    --checkbox-checked-border-color: SelectedItem;
+    --checkbox-checked-hover-bgcolor: -moz-Field;
+    --checkbox-checked-active-bgcolor: -moz-Field;
+  }
+}
+
+:root {
+  font: message-box;
+  appearance: none;
+  background-color: var(--in-content-page-background);
+  color: var(--in-content-page-color);
+}
+
+:root:not(.system-font-size) {
+  font-size: var(--in-content-font-body-size-base);
+}
+
+html|body {
+  margin: 0;
+}
+
+html|h1 {
+  font-size: 2.5em;
+  font-weight: lighter;
+  line-height: 1.2;
+  color: var(--in-content-text-color);
+  margin: 0;
+  margin-bottom: .5em;
+}
+
+html|hr {
+  border-style: solid none none none;
+  border-color: var(--in-content-border-color);
+}
+
+html|h2 {
+  font-weight: 600;
+  line-height: 1.4em;
+}
+
+.main-content {
+  padding: 40px 28px;
+  overflow: auto;
+}
+
+/* tabpanels and tabs */
+
+xul|tabpanels {
+  appearance: none;
+  border: none;
+  padding: 0;
+  background-color: transparent;
+  color: inherit;
+  color-scheme: unset;
+}
+
+xul|tabs {
+  margin-bottom: 10px;
+  border-bottom: 1px solid var(--in-content-border-color);
+  background-color: transparent;
+  color: inherit;
+}
+
+xul|tab {
+  appearance: none;
+  margin: 0;
+  padding: 2px 20px 0;
+  min-height: 44px;
+  color: inherit;
+  background-color: transparent;
+  border-bottom: 2px solid transparent;
+  transition: background-color 50ms ease 0s;
+  color-scheme: unset;
+}
+
+xul|tab:where(:hover) {
+  border-bottom-color: var(--in-content-border-color);
+  background-color: var(--in-content-button-background-hover);
+  color: var(--in-content-button-text-color-hover);
+}
+
+xul|tab:where(:hover:active) {
+  background-color: var(--in-content-button-background-active);
+  color: var(--in-content-button-text-color-active);
+}
+
+xul|tab[selected] {
+  color: var(--in-content-accent-color);
+  border-bottom-color: currentColor;
+}
+
+xul|tab[selected]:hover {
+  background-color: var(--in-content-button-background-hover);
+}
+
+xul|tab[selected]:hover:active {
+  background-color: var(--in-content-button-background-active);
+}
+
+@media (prefers-contrast) {
+  xul|tab:hover,
+  xul|tab:hover:active {
+    border-bottom-color: currentColor;
+  }
+
+  xul|tab[selected]:hover {
+    color: var(--in-content-button-text-color-hover);
+  }
+
+  xul|tab[selected]:hover:active {
+    color: var(--in-content-button-text-color-active);
+  }
+}
+
+/* html buttons */
+
+html|button {
+  font: inherit;
+}
+
+/* xul buttons and menulists */
+
+button,
+html|select,
+html|input[type="color"],
+xul|menulist {
+  appearance: none;
+  min-height: 32px;
+  color: var(--in-content-button-text-color);
+  border: 1px solid var(--in-content-button-border-color);
+  border-radius: 4px;
+  background-color: var(--in-content-button-background);
+  font-weight: 400;
+  padding: 7px 15px;
+  text-decoration: none;
+  margin: 4px 8px;
+  /* Ensure font-size isn't overridden by widget styling (e.g. in forms.css) */
+  font-size: 1em;
+}
+
+button {
+  font-weight: 600;
+}
+
+/* Small buttons get sized to 6/12px padding (when adding the 1px border) */
+button.small-button {
+  padding: 5px 11px;
+  min-height: 24px;
+  font-size: 0.9em;
+}
+
+/* Remove margin added by button.css */
+xul|button > .button-box > .button-text {
+  margin: 0;
+}
+
+xul|button,
+html|button {
+  /* Use the same margin of other elements for the alignment */
+  margin-inline: 4px;
+}
+
+::-moz-focus-inner {
+  border: none;
+}
+
+button:focus-visible,
+html|select:focus-visible,
+html|input:is([type="checkbox"], [type="color"], [type="radio"]):focus-visible,
+xul|menulist:focus-visible,
+xul|checkbox:not([native]):focus-visible > .checkbox-check, /* :not([native]) to win specificity over checkbox.css */
+xul|radio[focused="true"] > .radio-check,
+xul|tab:focus-visible > .tab-middle > .tab-text {
+  box-shadow: none;
+  /* Don't set `var(--in-content-focus-outline)` here to allow more complicated UIs
+     to use a different color when needed */
+  outline: var(--in-content-focus-outline-width) solid var(--in-content-focus-outline-color);
+  outline-offset: var(--in-content-focus-outline-offset);
+}
+
+html|select:not([size], [multiple]) {
+  background-image: url("chrome://global/skin/icons/arrow-down-12.svg");
+  background-position: right 19px center;
+  background-repeat: no-repeat;
+  background-size: auto 12px;
+  -moz-context-properties: fill;
+  fill: currentColor;
+  font: inherit;
+  font-weight: 600;
+
+  /* The following padding matches how a menulist is internally spaced.
+   * 15px is the menulist's standard padding-inline, 3px is for
+   * the internal label margin, 12px is the dropmarker's width
+   * and 4px is the dropmarker's margin-inline-end. */
+  padding-inline-start: calc(15px + 3px);
+  padding-inline-end: calc(15px + 12px + 4px);
+  text-overflow: ellipsis;
+}
+
+html|select:not([size], [multiple]):dir(rtl) {
+  background-position-x: left 19px;
+}
+
+html|select:not([size], [multiple]) > html|option {
+  background-color: var(--in-content-box-background);
+  color: var(--in-content-text-color);
+}
+
+html|button:enabled:hover,
+html|select:not([size], [multiple]):enabled:hover,
+html|input[type="color"]:hover,
+xul|button:not([disabled="true"]):hover,
+xul|menulist:not([disabled="true"]):hover {
+  background-color: var(--in-content-button-background-hover);
+  color: var(--in-content-button-text-color-hover);
+  border-color: var(--in-content-button-border-color-hover);
+}
+
+html|button:enabled:hover:active,
+html|select:not([size], [multiple]):enabled:hover:active,
+html|input[type="color"]:enabled:hover:active,
+xul|button:not([disabled="true"]):hover:active,
+xul|button[open],
+xul|button[open]:hover,
+xul|menulist[open="true"]:not([disabled="true"]) {
+  background-color: var(--in-content-button-background-active);
+  color: var(--in-content-button-text-color-active);
+  border-color: var(--in-content-button-border-color-active);
+}
+
+html|button:disabled,
+html|select:disabled,
+html|input[type="color"]:disabled,
+xul|button[disabled="true"],
+xul|menulist[disabled="true"] {
+  opacity: 0.4;
+}
+
+html|button[autofocus],
+html|button[type="submit"],
+xul|button[default],
+button.primary {
+  background-color: var(--in-content-primary-button-background);
+  color: var(--in-content-primary-button-text-color);
+  border-color: var(--in-content-primary-button-border-color);
+}
+
+html|button[autofocus]:enabled:hover,
+html|button[type="submit"]:enabled:hover,
+html|button.primary:enabled:hover,
+xul|button[default]:not([disabled="true"]):hover,
+xul|button.primary:not([disabled="true"]):hover {
+  background-color: var(--in-content-primary-button-background-hover);
+  color: var(--in-content-primary-button-text-color-hover);
+  border-color: var(--in-content-primary-button-border-hover);
+}
+
+html|button[autofocus]:enabled:hover:active,
+html|button[type="submit"]:enabled:hover:active,
+html|button.primary:enabled:hover:active,
+xul|button[default]:not([disabled="true"]):hover:active,
+xul|button.primary:not([disabled="true"]):hover:active {
+  background-color: var(--in-content-primary-button-background-active);
+  color: var(--in-content-primary-button-text-color-active);
+  border-color: var(--in-content-primary-button-border-active);
+}
+
+@media not (prefers-contrast) {
+  html|button.semi-transparent:not(.ghost-button, .primary):enabled {
+    background-color: color-mix(in srgb, currentColor 10%, transparent);
+  }
+
+  html|button.semi-transparent:not(.primary):enabled:hover {
+    background-color: color-mix(in srgb, currentColor 20%, transparent);
+  }
+
+  html|button.semi-transparent:not(.primary):enabled:hover:active {
+    background-color: color-mix(in srgb, currentColor 30%, transparent);
+  }
+}
+
+.danger-button {
+  --in-content-primary-button-background: var(--in-content-danger-button-background);
+  --in-content-primary-button-background-hover: var(--in-content-danger-button-background-hover);
+  --in-content-primary-button-background-active: var(--in-content-danger-button-background-active);
+  --in-content-focus-outline-color: var(--in-content-danger-button-background);
+}
+
+@media not (prefers-contrast) {
+  html|button.ghost-button {
+    background-color: transparent;
+  }
+}
+
+html|button.ghost-button:not(.semi-transparent):enabled:hover {
+  background-color: var(--in-content-button-background-hover);
+  color: var(--in-content-button-text-color-hover);
+}
+
+html|button.ghost-button:not(.semi-transparent):enabled:hover:active {
+  background-color: var(--in-content-button-background-active);
+  color: var(--in-content-button-text-color-active);
+}
+
+html|button.ghost-button.icon-button {
+  height: 16px;
+  width: 16px;
+  min-width: auto;
+  background-repeat: no-repeat;
+  background-size: 16px;
+  background-position: center;
+  fill: currentColor;
+  -moz-context-properties: fill;
+}
+
+html|input[type="color"] {
+  padding: 6px;
+  width: 50px;
+}
+
+xul|menulist[image]::part(icon) {
+  margin-inline-end: 5px;
+}
+
+xul|menulist::part(dropmarker) {
+  appearance: none;
+  margin-inline-end: 4px;
+  padding: 0;
+  border: none;
+  background-color: transparent;
+  list-style-image: url("chrome://global/skin/icons/arrow-down-12.svg");
+  align-items: center;
+  -moz-context-properties: fill;
+  fill: currentColor;
+}
+
+xul|menulist > xul|menupopup {
+  appearance: none;
+
+  /* Reset native styles on Windows and macOS */
+  border: none;
+  background-color: transparent;
+
+  --panel-border-color: var(--in-content-box-border-color);
+  --panel-border-radius: 2px;
+  --panel-background: var(--in-content-box-background);
+  --panel-color: var(--in-content-text-color);
+  --panel-padding: 0;
+}
+
+xul|menulist > xul|menupopup xul|menu,
+xul|menulist > xul|menupopup xul|menuitem {
+  appearance: none;
+  font-size: 1em;
+  padding-block: 0.2em;
+  padding-inline: 10px 30px;
+}
+
+xul|menulist > xul|menupopup > xul|menu:not([disabled="true"])[_moz-menuactive="true"],
+xul|menulist > xul|menupopup > xul|menuitem:not([disabled="true"])[_moz-menuactive="true"] {
+  color: var(--in-content-item-hover-text);
+  background-color: var(--in-content-item-hover);
+}
+
+xul|menulist > xul|menupopup > xul|menu:not([disabled="true"])[selected="true"],
+xul|menulist > xul|menupopup > xul|menuitem:not([disabled="true"])[selected="true"] {
+  color: var(--in-content-item-selected-text);
+  background-color: var(--in-content-item-selected);
+}
+
+xul|menulist > xul|menupopup > xul|menu[disabled="true"],
+xul|menulist > xul|menupopup > xul|menuitem[disabled="true"] {
+  color: #999;
+  /* override the [_moz-menuactive="true"] background color from
+     global/menu.css */
+  background-color: transparent;
+}
+
+xul|menulist > xul|menupopup xul|menuseparator {
+  appearance: none;
+  margin: 0;
+  padding: 0;
+  border-top: 1px solid var(--in-content-box-border-color);
+  border-bottom: none;
+}
+
+/* textboxes */
+
+html|input:is([type="email"], [type="tel"], [type="text"], [type="password"], [type="url"], [type="number"]),
+html|textarea,
+xul|search-textbox {
+  appearance: none;
+  border: 1px solid var(--in-content-box-border-color);
+  border-radius: 4px;
+  color: inherit;
+  background-color: var(--in-content-box-background);
+}
+
+xul|search-textbox {
+  min-height: 32px;
+  padding-inline: 8px;
+}
+
+html|input:is([type="email"], [type="tel"], [type="text"], [type="password"], [type="url"], [type="number"]),
+html|textarea {
+  font-family: inherit;
+  font-size: inherit;
+  padding: 8px;
+  margin: 2px 4px;
+}
+
+html|input:is([type="email"], [type="tel"], [type="text"], [type="password"], [type="url"], [type="number"]):focus,
+html|textarea:focus,
+xul|search-textbox[focused],
+xul|tree:focus-visible,
+xul|richlistbox:focus-visible {
+  border-color: transparent;
+  outline: var(--in-content-focus-outline);
+  outline-offset: -1px; /* Prevents antialising around the corners */
+}
+
+html|input:is([type="email"], [type="tel"], [type="text"], [type="password"], [type="url"], [type="number"]):-moz-ui-invalid,
+html|textarea:-moz-ui-invalid {
+  border-color: transparent;
+  outline: 2px solid var(--in-content-border-invalid);
+  outline-offset: -1px; /* Prevents antialising around the corners */
+}
+
+html|input:is([type="email"], [type="tel"], [type="text"], [type="password"], [type="url"], [type="number"]):disabled,
+html|textarea:disabled,
+xul|search-textbox[disabled="true"] {
+  opacity: 0.4;
+}
+
+/* Links */
+
+html|a,
+.text-link {
+  color: var(--in-content-link-color);
+}
+
+html|a:hover,
+.text-link:hover,
+button.text-link:is(:not([disabled="true"]), :enabled):hover {
+  color: var(--in-content-link-color-hover);
+}
+
+html|a:visited {
+  color: var(--in-content-link-color-visited);
+}
+
+html|a:hover:active,
+.text-link:hover:active,
+button.text-link:is(:not([disabled="true"]), :enabled):hover:active {
+  color: var(--in-content-link-color-active);
+  text-decoration: none;
+}
+
+html|a:focus-visible,
+.text-link:focus-visible {
+  outline: var(--in-content-focus-outline);
+  outline-offset: 1px;
+  border-radius: 4px;
+}
+
+button.text-link {
+  background-color: transparent !important; /* override hover related background changes */
+  padding: 0;
+  border: 0;
+  font-weight: normal;
+  min-height: 0;
+  min-width: 0;
+}
+
+/* Checkboxes and radio buttons */
+
+/* Add invisible vertical click-target */
+xul|*.checkbox-check,
+html|input[type="checkbox"] {
+  margin-block: 2px;
+}
+
+html|input[type="checkbox"] {
+  appearance: none;
+  height: 16px;
+  width: 16px;
+  border: 1px solid var(--checkbox-border-color);
+  background-color: var(--checkbox-unchecked-bgcolor);
+  border-radius: 2px;
+  margin-inline: 0 6px;
+  flex-shrink: 0; /* avoid shrinking inside flex container */
+}
+
+html|input[type="checkbox"]:enabled:hover {
+  background-color: var(--checkbox-unchecked-hover-bgcolor);
+}
+
+html|input[type="checkbox"]:enabled:hover:active {
+  background-color: var(--checkbox-unchecked-active-bgcolor);
+}
+
+html|input[type="checkbox"]:checked {
+  border-color: var(--checkbox-checked-border-color);
+  background-color: var(--checkbox-checked-bgcolor);
+  background-image: url("chrome://global/skin/icons/check.svg");
+  background-position: center;
+  background-repeat: no-repeat;
+  -moz-context-properties: fill;
+  fill: currentColor;
+  color: var(--checkbox-checked-color);
+  /* Style the button also when printing with "Print Backgrounds" unchecked */
+  color-adjust: exact;
+}
+
+html|input[type="checkbox"]:enabled:checked:hover {
+  background-color: var(--checkbox-checked-hover-bgcolor);
+}
+
+html|input[type="checkbox"]:enabled:checked:hover:active {
+  background-color: var(--checkbox-checked-active-bgcolor);
+}
+
+@media (prefers-contrast) {
+  html|input[type="checkbox"] {
+    /* Normalize the border-color to the in-content version following color */
+    border-color: currentColor;
+    color: var(--checkbox-border-color);
+  }
+
+  html|input[type="checkbox"]:not(:checked):enabled:hover {
+    /* color sets the border color in HCM in-content */
+    color: var(--checkbox-checked-border-color);
+  }
+
+  html|input[type="checkbox"]:checked:enabled {
+    /* color sets the border color in HCM in-content */
+    color: var(--checkbox-checked-bgcolor);
+    fill: var(--checkbox-checked-color);
+  }
+
+  html|input[type="checkbox"]:checked:enabled:hover {
+    fill: var(--checkbox-checked-bgcolor);
+  }
+}
+
+xul|richlistitem > xul|*.checkbox-check {
+  margin: 3px 6px;
+}
+
+html|*.radio-container-with-text,
+html|*.toggle-container-with-text {
+  display: flex;
+  align-items: center;
+}
+
+xul|radio {
+  margin-inline-start: 0;
+  appearance: none;
+}
+
+html|input[type="radio"],
+xul|*.radio-check {
+  appearance: none;
+  width: 16px;
+  height: 16px;
+  padding: 0;
+  border: 1px solid var(--in-content-box-border-color);
+  border-radius: 100%;
+  margin-block: 2px; /* extend the vertical clicktarget */
+  margin-inline: 0 6px;
+  background-color: var(--in-content-button-background);
+  background-position: center;
+  flex-shrink: 0; /* avoid shrinking inside flex container */
+}
+
+@media (prefers-contrast) {
+  html|input[type="radio"],
+  xul|*.radio-check {
+    border-color: var(--in-content-button-border-color);
+  }
+
+  html|input[type="radio"]:enabled:hover,
+  xul|radio:not([disabled="true"]):hover > xul|*.radio-check {
+    border-color: var(--in-content-button-border-color-hover);
+  }
+
+  html|input[type="radio"]:enabled:hover:active,
+  xul|radio:not([disabled="true"]):hover:active > xul|*.radio-check {
+    border-color: var(--in-content-button-border-color-active);
+  }
+}
+
+html|input[type="radio"]:enabled:hover,
+xul|radio:not([disabled="true"]):hover > xul|*.radio-check {
+  background-color: var(--in-content-button-background-hover);
+  color: var(--in-content-button-text-color-hover);
+}
+
+html|input[type="radio"]:enabled:hover:active,
+xul|radio:not([disabled="true"]):hover:active > xul|*.radio-check {
+  background-color: var(--in-content-button-background-active);
+  color: var(--in-content-button-text-color-active);
+}
+
+html|input[type="radio"]:checked,
+xul|*.radio-check[selected] {
+  -moz-context-properties: fill;
+  fill: currentColor;
+  color: var(--in-content-primary-button-text-color);
+  background-color: var(--in-content-primary-button-background);
+  background-image: url("chrome://global/skin/icons/radio.svg");
+  border-color: var(--in-content-primary-button-border-color);
+
+  /* Style the button also when printing with "Print Backgrounds" unchecked */
+  color-adjust: exact;
+}
+
+html|input[type="radio"]:enabled:checked:hover,
+xul|radio:not([disabled="true"])[selected]:hover > xul|*.radio-check {
+  background-color: var(--in-content-primary-button-background-hover);
+  color: var(--in-content-primary-button-text-color-hover);
+  border-color: var(--in-content-primary-button-border-hover);
+}
+
+html|input[type="radio"]:enabled:checked:hover:active,
+xul|radio:not([disabled="true"])[selected]:hover:active > xul|*.radio-check {
+  background-color: var(--in-content-primary-button-background-active);
+  color: var(--in-content-primary-button-text-color-active);
+  border-color: var(--in-content-primary-button-border-active);
+}
+
+xul|*.radio-label-box {
+  margin-inline: 0 8px;
+  padding-inline-start: 0;
+}
+
+/* Disabled checkboxes, radios and labels */
+
+xul|checkbox[disabled="true"],
+xul|radio[disabled="true"],
+xul|label[disabled="true"] {
+  color: inherit;
+}
+
+html|input[type="checkbox"]:disabled,
+html|input[type="radio"]:disabled,
+xul|checkbox[disabled="true"],
+xul|radio[disabled="true"],
+xul|label[disabled="true"] {
+  opacity: 0.5;
+}
+
+/* Category List */
+
+#categories {
+  appearance: none;
+  background-color: initial; /* override the background-color set on all richlistboxes in common.inc.css */
+  margin: 70px 0 0;
+  border-width: 0;
+  width: var(--in-content-sidebar-width);
+  outline: none;
+}
+
+@media print {
+  #categories {
+    display: none;
+  }
+}
+
+html|*#categories {
+  box-sizing: border-box;
+  padding: 1px;
+}
+
+#categories > .category {
+  border: 1px solid var(--in-content-primary-button-border-color);
+  border-radius: 4px;
+  min-height: 48px;
+  appearance: none;
+  color: inherit;
+  margin-inline-start: 34px;
+  padding-inline: 10px;
+  transition: background-color 150ms;
+}
+
+html|*#categories > html|*.category {
+  border: 1px solid var(--in-content-primary-button-border-color);
+  background-color: initial;
+  background-size: 24px;
+  background-repeat: no-repeat;
+  background-position-x: 10px;
+  background-position-y: 12px;
+  margin-inline-end: 0;
+  min-width: auto;
+  padding-inline-start: 34px;
+  text-align: start;
+  -moz-context-properties: fill, fill-opacity;
+  fill: currentColor;
+}
+
+html|*#categories > html|*.category:dir(rtl) {
+  background-position-x: right 10px;
+}
+
+#categories > .category:hover {
+  background-color: var(--in-content-button-background-hover);
+  color: var(--in-content-button-text-color-hover);
+  border-color: var(--in-content-button-border-color-hover);
+}
+
+#categories > .category:hover:active {
+  background-color: var(--in-content-button-background-active);
+  color: var(--in-content-button-text-color-active);
+  border-color: var(--in-content-button-border-color-active);
+}
+
+@media not (prefers-contrast) {
+  #categories > .category[selected],
+  #categories > .category.selected {
+    color: var(--in-content-accent-color);
+  }
+
+  #categories > .category[selected]:not(:hover) {
+    /* override richlistitem selected style while letting hover style above apply */
+    background-color: transparent;
+  }
+
+  #categories > .category[selected]:hover:active,
+  #categories > .category.selected:hover:active {
+    color: var(--in-content-accent-color-active);
+  }
+}
+
+@media (prefers-contrast) {
+  #categories > .category {
+    /* The transition causes issues with the text getting a background while
+     * transitioning and it looks weird. */
+    transition: none;
+    /* We need a true transparent but in HCM this would compute to an actual color,
+     * so select the page's background color instead: */
+    border-color: var(--in-content-page-background);
+  }
+
+  #categories > .category[selected],
+  #categories > .category.selected {
+    background-color: var(--in-content-button-background-hover);
+    color: var(--in-content-button-text-color-hover);
+    border-color: var(--in-content-button-border-color-hover);
+  }
+}
+
+#categories[keyboard-navigation="true"]:focus-visible > .category[current],
+#categories > .category:focus-visible {
+  outline: var(--in-content-focus-outline);
+  outline-offset: var(--in-content-focus-outline-inset);
+}
+
+html|*#categories[last-input-type="mouse"] > html|button.category:focus-visible {
+  outline: none;
+}
+
+.category-name {
+  font-size: 1.07em;
+  line-height: 1.4em;
+  padding-inline-start: 9px;
+  margin: 0;
+  user-select: none;
+}
+
+.category-icon {
+  width: 24px;
+  height: 24px;
+  -moz-context-properties: fill, fill-opacity;
+  fill: currentColor;
+}
+
+.category[selected] > .category-icon,
+.category.selected > .category-icon {
+  fill-opacity: 1;
+}
+
+@media (max-width: 830px) {
+  :root {
+    --in-content-sidebar-width: 118px;
+  }
+
+  html|*.category:not(.category-no-icon) > html|*.category-name,
+  .category-icon + .category-name {
+    display: none;
+  }
+
+  #categories > .category {
+    padding-inline-start: 12px; /* make category icons align center */
+    margin-inline-end: 33px;
+  }
+
+  html|*#categories > html|*.category {
+    width: 48px;
+    min-width: auto;
+    box-sizing: border-box;
+  }
+
+  html|*#categories > html|*.category,
+  /* We need to override the full-width RTL rule, so explicitly specify RTL. */
+  html|*#categories > html|*.category:dir(rtl) {
+    background-position: center;
+  }
+
+  .main-content {
+    padding-inline: 0;
+  }
+
+  .pane-container {
+    margin-inline-end: 10px;
+  }
+}
+
+/* header */
+
+.header {
+  margin-inline-end: 4px; /* add the 4px end-margin of other elements */
+  margin-bottom: 15px;
+  padding-bottom: 15px;
+  align-items: baseline;
+}
+
+.header-name {
+  font-size: 1.46em;
+  font-weight: 300;
+  line-height: 1.3em;
+  margin: 0;
+}
+
+/* List boxes */
+
+html|select[size][multiple],
+xul|listheader,
+xul|richlistbox {
+  appearance: none;
+  margin-inline: 0;
+  background-color: var(--in-content-box-background);
+  border: 1px solid var(--in-content-box-border-color);
+  border-radius: 4px;
+  color: var(--in-content-text-color);
+}
+
+xul|listheader {
+  border-bottom-left-radius: 0;
+  border-bottom-right-radius: 0;
+  overflow: clip; /* Clip border-radius */
+}
+
+xul|listheader + xul|richlistbox {
+  margin-top: 0;
+  border-top: none;
+  border-top-left-radius: 0;
+  border-top-right-radius: 0;
+}
+
+html|select[size][multiple] > html|option,
+xul|treechildren::-moz-tree-row {
+  padding: 0.3em;
+  margin: 0;
+  border: none;
+  border-radius: 0;
+  background-image: none;
+}
+
+xul|treechildren::-moz-tree-row(multicol, odd) {
+  background-color: var(--in-content-box-background-odd);
+}
+
+html|select[size][multiple] > html|option:hover,
+xul|treechildren::-moz-tree-row(hover) {
+  background-color: var(--in-content-item-hover);
+  color: var(--in-content-item-hover-text);
+}
+
+xul|richlistbox > xul|richlistitem[selected],
+xul|treechildren::-moz-tree-row(selected) {
+  background-color: var(--in-content-item-selected);
+  color: var(--in-content-item-selected-text);
+}
+
+@media not (prefers-contrast) {
+  xul|richlistbox:not(#categories) > xul|richlistitem[selected] {
+    /* Ensure buttons/menulists inside richlistitems (containers, applications) look OK */
+    --in-content-button-background: color-mix(in srgb, currentColor 15%, transparent);
+    --in-content-button-background-hover: color-mix(in srgb, currentColor 30%, transparent);
+    --in-content-button-background-active: color-mix(in srgb, currentColor 45%, transparent);
+    --in-content-button-text-color: var(--in-content-item-selected-text);
+    --in-content-button-text-color-hover: var(--in-content-item-selected-text);
+    --in-content-button-text-color-active: var(--in-content-button-text-color-hover);
+    --in-content-focus-outline-color: var(--in-content-item-selected-text);
+  }
+}
+
+xul|richlistitem[selected] xul|menulist:focus-visible {
+  outline-offset: var(--in-content-focus-outline-inset);
+}
+
+/* Use a 2px border so that selected row highlight is still visible behind
+    an existing high-contrast border that uses the background color */
+@media (prefers-contrast) {
+  xul|treechildren::-moz-tree-row(selected) {
+     border: 2px solid currentColor;
+     border-radius: 4px;
+  }
+}
+
+xul|panel[type="autocomplete-richlistbox"] {
+  background-color: var(--in-content-box-background);
+  border: 1px solid var(--in-content-box-border-color);
+  color: var(--in-content-text-color);
+}
+
+/* Trees */
+
+xul|tree {
+  appearance: none;
+  font-size: 1em;
+  border: 1px solid var(--in-content-box-border-color);
+  border-radius: 4px;
+  background-color: var(--in-content-box-background);
+  color: inherit;
+  margin: 0;
+}
+
+xul|treecols {
+  appearance: none;
+  border: none;
+  border-top-left-radius: 4px;
+  border-top-right-radius: 4px;
+  border-bottom: 1px solid var(--in-content-border-color);
+  overflow: clip; /* Clip border-radius */
+  padding: 0;
+}
+
+xul|treecol:not([hideheader="true"]),
+.tree-columnpicker-button {
+  appearance: none;
+  border: none;
+  border-radius: unset;
+  background-color: var(--in-content-button-background);
+  color: var(--in-content-button-text-color, inherit);
+  padding: 5px 10px;
+}
+
+xul|treecol:not([hideheader="true"], [sortable="false"]):hover,
+.tree-columnpicker-button:hover {
+  background-color: var(--in-content-button-background-hover);
+  color: var(--in-content-button-text-color-hover);
+}
+
+xul|treecol:not([hideheader="true"], [sortable="false"]):hover:active,
+.tree-columnpicker-button:hover:active {
+  background-color: var(--in-content-button-background-active);
+  color: var(--in-content-button-text-color-active);
+}
+
+xul|treecol:not([hideheader="true"], :first-child),
+.tree-columnpicker-button {
+  border-inline-start-width: 1px;
+  border-inline-start-style: solid;
+  border-image: linear-gradient(transparent 0%, transparent 20%, var(--in-content-box-border-color) 20%, var(--in-content-box-border-color) 80%, transparent 80%, transparent 100%) 1 1;
+}
+
+@media (prefers-contrast) {
+  xul|treecol:not([hideheader="true"], :first-child),
+  xul|treecolpicker {
+    --in-content-box-border-color: var(--in-content-button-border-color);
+  }
+}
+
+xul|treecol[sortDirection]:not([hideheader="true"]) > xul|*.treecol-sortdirection {
+  list-style-image: url("chrome://global/skin/icons/sort-arrow.svg");
+  -moz-context-properties: fill;
+  fill: currentColor;
+  width: 18px;
+  height: 18px;
+}
+
+xul|treecol[sortDirection="ascending"]:not([hideheader="true"]) > xul|*.treecol-sortdirection {
+  transform: scaleY(-1);
+}
+
+/* This is the only way to increase the height of a tree row unfortunately */
+xul|treechildren::-moz-tree-row {
+  min-height: 2em;
+}
+
+xul|treechildren::-moz-tree-cell-text(hover),
+xul|treechildren::-moz-tree-twisty(hover),
+xul|treechildren::-moz-tree-image(hover) {
+  color: var(--in-content-item-hover-text);
+}
+
+xul|treechildren::-moz-tree-cell-text(selected),
+xul|treechildren::-moz-tree-twisty(selected),
+xul|treechildren::-moz-tree-image(selected) {
+  color: var(--in-content-item-selected-text);
+}
+
+/* Message bars */
+.message-bar {
+  background-color: var(--in-content-box-info-background);
+  border-radius: 4px;
+  min-height: 32px;
+  align-items: center;
+  padding: 4px;
+}
+
+.message-bar-description {
+  margin: 2px 0;
+  line-height: 1.25;
+}
+
+.message-bar-description.rtl-locale {
+  direction: rtl;
+  text-align: match-parent;
+}
+
+/* The message-bar-button styles have extra specificity to override
+ * the defaults for buttons. */
+.message-bar-content > .message-bar-button {
+  background-color: var(--grey-90-a10);
+  border: none;
+  border-radius: 2px;
+  height: 24px;
+  margin-inline-start: 8px;
+  padding: 0 8px;
+}
+
+.message-bar-content > .message-bar-button:hover {
+  background-color: var(--grey-90-a20);
+}
+
+.message-bar-content > .message-bar-button:hover:active {
+  background-color: var(--grey-90-a30);
+}
+
+.message-bar-icon {
+  list-style-image: url("chrome://global/skin/icons/info.svg");
+  width: 24px;
+  height: 24px;
+  padding: 4px;
+  margin-inline-end: 4px;
+  -moz-context-properties: fill;
+  fill: currentColor;
+}
+
+/* Warning styles */
+.message-bar-warning {
+  background-color: var(--yellow-50);
+  color: var(--yellow-90);
+}
+
+.message-bar-warning > .message-bar-icon {
+  list-style-image: url("chrome://global/skin/icons/warning.svg");
+}
+
+input[type="text"][warning]:enabled:not(:focus) {
+  border-color: var(--yellow-60);
+  box-shadow: 0 0 0 1px var(--yellow-60), 0 0 0 4px var(--yellow-60-a30);
+}
+
+/* Cards */
+
+.card {
+  background: var(--in-content-box-background);
+  /* Needed for high-contrast where the border will appear. */
+  border: 1px solid transparent;
+  border-radius: 4px;
+  box-shadow: var(--card-shadow);
+  margin: 0 0 8px;
+  /* Remove the border from the overall padding. */
+  padding: calc(var(--card-padding) - 1px);
+  transition: box-shadow 150ms;
+}
+
+.card:not(.card-no-hover):hover {
+  box-shadow: var(--card-shadow-hover);
+}
+
+.card-heading-image {
+  border-top-left-radius: 4px;
+  border-top-right-radius: 4px;
+  margin: -16px -16px 16px;
+}
+
+.card-heading-image:dir(rtl) {
+  transform: scaleX(-1);
+}
+
+/* Sidebar footer links */
+
+.sidebar-footer-list {
+  list-style-type: none;
+  margin-block: 0 36px;
+  margin-inline: 34px 0;
+  padding: 0;
+}
+
+.sidebar-footer-link {
+  height: 36px;
+  cursor: default;
+  border: 1px solid var(--in-content-button-border-color);
+  border-radius: 4px;
+  display: flex;
+  align-items: center;
+}
+
+@media (prefers-contrast) {
+  .sidebar-footer-link {
+    /* We need a true transparent but in HCM this would compute to an actual color,
+     * so select the page's background color instead: */
+    border-color: var(--in-content-page-background);
+  }
+}
+
+.sidebar-footer-link,
+.sidebar-footer-link:visited {
+  /* Override link style for :hover and :hover:active states */
+  text-decoration: none !important;
+  color: inherit;
+}
+
+xul|*.sidebar-footer-link {
+  display: flex;
+  align-items: center;
+}
+
+.sidebar-footer-link:hover {
+  background-color: var(--in-content-button-background-hover);
+  color: var(--in-content-button-text-color-hover);
+  border-color: var(--in-content-button-border-color-hover);
+}
+
+.sidebar-footer-link:hover:active:not([disabled]) {
+  background-color: var(--in-content-button-background-active);
+  color: var(--in-content-button-text-color-active);
+  border-color: var(--in-content-button-border-color-active);
+}
+
+.sidebar-footer-link:focus-visible {
+  outline: var(--in-content-focus-outline);
+  outline-offset: var(--in-content-focus-outline-inset);
+}
+
+.sidebar-footer-icon {
+  -moz-context-properties: fill, fill-opacity;
+  fill: currentColor;
+  width: 16px;
+  height: 16px;
+  margin: 10px;
+  margin-inline-start: 13px;
+}
+
+.sidebar-footer-label {
+  font-size: .9em;
+  margin: 0 4px;
+  user-select: none;
+}
+
+@media (max-width: 830px) {
+  .sidebar-footer-list {
+    margin-inline-start: 40px;
+    align-items: flex-start;
+  }
+
+  .sidebar-footer-link {
+    width: 36px;
+    height: 36px;
+    padding-inline-start: 0;
+    margin-inline-start: 1px;
+  }
+
+  .sidebar-footer-icon {
+    margin-inline-start: 10px;
+  }
+
+  .sidebar-footer-label {
+    display: none;
+  }
+}
+
+/* Icon helper classes */
+
+xul|*.help-icon {
+  list-style-image: url("chrome://global/skin/icons/help.svg");
+}
+
+xul|*.addons-icon {
+  list-style-image: url("chrome://mozapps/skin/extensions/extension.svg");
+}
+
+/* Back button */
+
+.back-button {
+  -moz-context-properties: fill;
+  fill: currentColor;
+  background-image: url("chrome://global/skin/icons/arrow-left.svg");
+  background-repeat: no-repeat;
+  background-position: center;
+  min-width: auto;
+  width: 32px;
+  margin-block: 0;
+  margin-inline-start: 0;
+}
+
+.back-button:-moz-locale-dir(rtl),
+.back-button:dir(rtl) {
+  transform: scaleX(-1);
+}
+
+/* Adjust vertical margins for buttons in dialogs. We do this here because
+ * this sheet gets inserted into the Shadow DOM for the button box in the dialog,
+ * so can actually affect the button styling that way.  */
+:host(dialog[subdialog]) .dialog-button-box > button {
+  margin: 0 4px;
+  min-width: auto;
+}
diff --git a/toolkit/themes/shared/in-content/info-pages.css b/toolkit/themes/shared/in-content/info-pages.css
new file mode 100644
index 0000000000..a0307960b8
--- /dev/null
+++ b/toolkit/themes/shared/in-content/info-pages.css
@@ -0,0 +1,182 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+@import url("chrome://global/skin/in-content/common.css");
+
+:root {
+  --in-content-container-min-width: 13em;
+  --in-content-container-max-width: 52em;
+}
+
+/* Body and container */
+body {
+  display: flex;
+  flex-direction: column;
+  box-sizing: border-box;
+  min-height: 100vh;
+  padding: 40px 48px;
+  align-items: center;
+  justify-content: center;
+}
+
+body.wide-container {
+  display: block;
+}
+
+.container {
+  min-width: var(--in-content-container-min-width);
+  max-width: var(--in-content-container-max-width);
+}
+
+/* Typography */
+.title {
+  background-position: left 0;
+  background-repeat: no-repeat;
+  background-size: 1.6em;
+  margin-inline-start: -2.3em;
+  padding-inline-start: 2.3em;
+  font-size: 2.2em;
+  -moz-context-properties: fill;
+  fill: currentColor;
+}
+
+.title:-moz-locale-dir(rtl),
+.title:dir(rtl) {
+  background-position: right 0;
+}
+
+.title-text {
+  font-size: inherit;
+  padding-bottom: 0.4em;
+}
+
+@media (max-width: 970px) {
+  .title {
+    padding-inline-start: 0;
+    margin-inline-start: 0;
+    padding-top: 2.3em;
+  }
+
+  .title-text {
+    padding-top: 0;
+  }
+}
+
+.page-subtitle {
+  margin-bottom: 2em;
+}
+
+ul, ol {
+  margin: 1em 0;
+  padding: 0;
+  margin-inline-start: 2em;
+}
+
+ul > li, ol > li {
+  margin-bottom: .5em;
+}
+
+ul {
+  list-style: disc;
+}
+
+dt {
+  font-weight: bold;
+}
+
+ul.columns {
+  column-count: 2;
+  column-gap: 5em;
+}
+
+@media (max-width: 35em) {
+  ul.columns {
+    column-count: 1;
+  }
+}
+
+/* Buttons */
+.button-container {
+  margin-top: 1.2em;
+}
+
+button {
+  padding: 0 1.5em;
+}
+
+.button-container > button:first-child {
+  margin-inline-start: 0;
+}
+
+.button-container > button:last-child {
+  margin-inline-end: 0;
+}
+
+/* Trees */
+
+tree {
+  width: 100%;
+}
+
+/* Tables */
+
+table {
+  background-color: var(--in-content-table-background);
+  color: var(--in-content-text-color);
+  font: message-box;
+  text-align: start;
+  width: 100%;
+  border: 1px solid var(--in-content-table-border-color);
+  border-radius: 4px;
+  border-spacing: 0;
+  overflow: hidden;
+}
+
+table button {
+  padding-inline: 3px;
+}
+
+th, td {
+  padding: 4px;
+  text-align: match-parent;
+}
+
+thead th {
+  text-align: center;
+}
+
+th {
+  background-color: var(--in-content-table-header-background);
+  color: var(--in-content-table-header-color);
+  border: 1px solid var(--in-content-table-border-color);
+}
+
+th.column {
+  white-space: nowrap;
+  width: 0;
+}
+
+td {
+  border: 1px solid var(--in-content-border-color);
+  unicode-bidi: plaintext; /* Make sure file paths will be LTR */
+}
+
+.action-box {
+  background-color: var(--in-content-table-background);
+  border: 1px solid var(--in-content-box-border-color);
+  border-radius: 4px;
+  padding: 16px;
+  flex: 1 1 25%;
+}
+
+.header-flex {
+  display: flex;
+  gap: 1.5rem;
+  margin-bottom: 1rem;
+  flex-wrap: wrap;
+}
+
+.content-flex {
+  flex: 1 1 65%;
+}
diff --git a/toolkit/themes/shared/in-content/wifi.svg b/toolkit/themes/shared/in-content/wifi.svg
new file mode 100644
index 0000000000..39fd936231
--- /dev/null
+++ b/toolkit/themes/shared/in-content/wifi.svg
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<svg version="1.1"
+     xmlns="http://www.w3.org/2000/svg"
+     width="64"
+     height="64"
+     viewBox="0 0 64 64">
+
+  <style>
+    .gray {
+      fill: #797c80;
+    }
+  </style>
+
+  <defs>
+    <clipPath id="clip-path">
+      <polygon points="32 52.35 78.88 6.06 -14.88 6.06 32 52.35"/>
+    </clipPath>
+  </defs>
+
+  <circle class="gray" cx="32" cy="52" r="6"/>
+
+  <g clip-path="url('#clip-path')">
+    <path class="gray" d="M71.63,52A39.63,39.63,0,1,1,32,12.38,39.63,39.63,0,0,1,71.63,52ZM32,7.63A44.38,44.38,0,1,0,76.38,52,44.38,44.38,0,0,0,32,7.63Z"/>
+    <path class="gray" d="M47.75,52A15.75,15.75,0,1,1,32,36.25,15.75,15.75,0,0,1,47.75,52ZM32,31.65A20.35,20.35,0,1,0,52.35,52,20.35,20.35,0,0,0,32,31.65Z"/>
+    <path class="gray" d="M59.58,52A27.58,27.58,0,1,1,32,24.42,27.58,27.58,0,0,1,59.58,52ZM32,19.38A32.63,32.63,0,1,0,64.63,52,32.63,32.63,0,0,0,32,19.38Z"/>
+  </g>
+</svg>