Added the old unread attribute for tabs

src/browser/components/tabbrowser/content/tabbrowser-js.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/components/tabbrowser/content/tabbrowser.js b/browser/components/tabbrowser/content/tabbrowser.js
-index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b5a2c7afd 100644
+index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e5741caf6 100644
 --- a/browser/components/tabbrowser/content/tabbrowser.js
 +++ b/browser/components/tabbrowser/content/tabbrowser.js
 @@ -456,11 +456,26 @@
@@ -31,7 +31,15 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b
        }
        return i;
      },
-@@ -2705,6 +2720,11 @@
+@@ -1340,6 +1355,7 @@
+       if (!this._previewMode) {
+         newTab.recordTimeFromUnloadToReload();
+         newTab.updateLastAccessed();
++        newTab.removeAttribute("unread");
+         oldTab.updateLastAccessed();
+         // if this is the foreground window, update the last-seen timestamps.
+         if (this.ownerGlobal == BrowserWindowTracker.getTopWindow()) {
+@@ -2705,6 +2721,11 @@
          );
        }
  
@@ -43,7 +51,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b
        if (!UserInteraction.running("browser.tabs.opening", window)) {
          UserInteraction.start("browser.tabs.opening", "initting", window);
        }
-@@ -2773,6 +2793,9 @@
+@@ -2773,6 +2794,9 @@
            noInitialLabel,
            skipBackgroundNotify,
          });
@@ -53,7 +61,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b
          if (insertTab) {
            // insert the tab into the tab container in the correct position
            this._insertTabAtIndex(t, {
-@@ -3262,6 +3285,14 @@
+@@ -3262,6 +3286,14 @@
          ) {
            tabWasReused = true;
            tab = this.selectedTab;
@@ -68,7 +76,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b
            if (!tabData.pinned) {
              this.unpinTab(tab);
            } else {
-@@ -3275,6 +3306,9 @@
+@@ -3275,6 +3307,9 @@
              restoreTabsLazily && !select && !tabData.pinned;
  
            let url = "about:blank";
@@ -78,7 +86,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b
            if (tabData.entries?.length) {
              let activeIndex = (tabData.index || tabData.entries.length) - 1;
              // Ensure the index is in bounds.
-@@ -3311,6 +3345,12 @@
+@@ -3311,6 +3346,12 @@
              preferredRemoteType,
            });
  
@@ -91,7 +99,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b
            if (select) {
              tabToSelect = tab;
            }
-@@ -3345,7 +3385,7 @@
+@@ -3345,7 +3386,7 @@
              this.tabContainer._invalidateCachedTabs();
            }
          }
@@ -100,7 +108,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b
          tab.initialize();
        }
  
-@@ -4152,6 +4192,13 @@
+@@ -4152,6 +4193,13 @@
          TelemetryStopwatch.start("FX_TAB_CLOSE_TIME_NO_ANIM_MS", aTab);
        }
  
@@ -114,7 +122,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b
        // Handle requests for synchronously removing an already
        // asynchronously closing tab.
        if (!animate && aTab.closing) {
-@@ -4198,6 +4245,7 @@
+@@ -4198,6 +4246,7 @@
          isLastTab ||
          aTab.pinned ||
          aTab.hidden ||
@@ -122,7 +130,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b
          this._removingTabs.size >
            3 /* don't want lots of concurrent animations */ ||
          !aTab.hasAttribute(
-@@ -5131,10 +5179,10 @@
+@@ -5131,10 +5180,10 @@
        SessionStore.deleteCustomTabValue(aTab, "hiddenBy");
      },
  
@@ -135,7 +143,15 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..f86d0e4e32988ce0b498ace83a9fcd9b
          aTab.selected ||
          aTab.closing ||
          // Tabs that are sharing the screen, microphone or camera cannot be hidden.
-@@ -7870,7 +7918,7 @@ var TabContextMenu = {
+@@ -7050,6 +7099,7 @@
+             aWebProgress.isTopLevel
+           ) {
+             this.mTab.setAttribute("busy", "true");
++            if (!this.mTab.selected) this.mTab.setAttribute("unread", "true");
+             gBrowser._tabAttrModified(this.mTab, ["busy"]);
+             this.mTab._notselectedsinceload = !this.mTab.selected;
+             gBrowser.syncThrobberAnimations(this.mTab);
+@@ -7870,7 +7920,7 @@ var TabContextMenu = {
      );
      contextUnpinSelectedTabs.hidden =
        !this.contextTab.pinned || !multiselectionContext;