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diff --git a/userChrome.css b/userChrome.css
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+/*** Proton Tabs Tweaks ***/
+
+/* Adjust tab corner shape, optionally remove space below tabs */
+
+/* Change Font */
+@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+/* Global UI font */
+*{      /* font-size: 30pt !important; font-weight: bold !important; */
+font-family: Ubuntu !important;   }
+
+
+/* Change appearance of tabs */
+#tabbrowser-tabs {
+    --user-tab-rounding: 4px;
+}
+
+.tab-background {
+    border-radius: var(--user-tab-rounding) var(--user-tab-rounding) 0px 0px !important; /* Connected */
+    margin-block: 1px 0 !important; /* Connected */
+}
+#scrollbutton-up, #scrollbutton-down { /* 6/10/2021 */
+    border-top-width: 1px !important;
+    border-bottom-width: 0 !important;
+}
+
+/* 1/16/2022 Tone down the Fx96 tab border with add-on themes in certain fallback situations */
+.tab-background:is([selected], [multiselected]):-moz-lwtheme {
+    --lwt-tabs-border-color: rgba(0, 0, 0, 0.5) !important;
+    border-bottom-color: transparent !important;
+}
+[brighttext="true"] .tab-background:is([selected], [multiselected]):-moz-lwtheme {
+    --lwt-tabs-border-color: rgba(255, 255, 255, 0.5) !important;
+    border-bottom-color: transparent !important;
+}
+
+/* Container color bar visibility */
+.tabbrowser-tab[usercontextid] > .tab-stack > .tab-background > .tab-context-line {
+    margin: 0px max(calc(var(--user-tab-rounding) - 3px), 0px) !important;
+}
+
+/* Override Normal Density height to Compact Density height only for tabs */
+
+#TabsToolbar, #tabbrowser-tabs {
+    --tab-min-height: 29px !important;
+}
+    /* Tweak for covering a line at the bottom of the active tab on some themes 8/11/2021 */
+#main-window[sizemode="normal"] #toolbar-menubar[autohide="true"] + #TabsToolbar, 
+#main-window[sizemode="normal"] #toolbar-menubar[autohide="true"] + #TabsToolbar #tabbrowser-tabs {
+    --tab-min-height: 30px !important;
+}
+#scrollbutton-up,
+#scrollbutton-down {
+    border-top-width: 0 !important;
+    border-bottom-width: 0 !important;
+}
+
+    /* [Connected Tabs] Set a max height based on min-height plus margin-block: 1px 0 */
+#TabsToolbar, #TabsToolbar > hbox, #TabsToolbar-customization-target, #tabbrowser-arrowscrollbox  {
+    max-height: calc(var(--tab-min-height) + 1px) !important;
+}
+    /* [Connected Tabs] Adjust padding around icons on buttons to avoid crushed images */
+#TabsToolbar-customization-target toolbarbutton > .toolbarbutton-icon, 
+#TabsToolbar-customization-target .toolbarbutton-text, 
+#TabsToolbar-customization-target .toolbarbutton-badge-stack,
+#scrollbutton-up,#scrollbutton-down {
+    padding-top: 7px !important;
+    padding-bottom: 6px !important;
+}
+
+/* Inactive tabs: Separator line style */
+
+.tabbrowser-tab:not([selected=true]):not([multiselected=true]):not([beforeselected-visible="true"]) .tab-background {
+    border-right: 1px solid var(--lwt-background-tab-separator-color, rgba(0, 0, 0, .20)) !important;
+}
+/* For dark backgrounds */
+[brighttext="true"] .tabbrowser-tab:not([selected=true]):not([multiselected=true]):not([beforeselected-visible="true"]) .tab-background {
+    border-right: 1px solid var(--lwt-background-tab-separator-color, var(--lwt-selected-tab-background-color, rgba(255, 255, 255, .20))) !important;
+}
+.tabbrowser-tab:not([selected=true]):not([multiselected=true]) .tab-background {
+    border-radius: 0 !important;
+}
+/* Remove padding between tabs */
+.tabbrowser-tab {
+    padding-left: 0 !important;
+    padding-right: 0 !important;
+}
+
+/* Override font-weight for tabs */
+
+.tabbrowser-tab {
+    font-weight: 600 !important;
+}
+
+/* Tweak Options as of 1/12/2022; Generated Tue Jan 18 2022 23:32:34 GMT+0000 (Coordinated Universal Time) */