FF gegen versehentliches schließen schützen

// Angepasst durch aborix
// ab Fx 133 wird in den Zeilen 57 und 58 pinnedTabCount statt _numPinnedTabs verwendet

(function() {

  if (window.__SSi != 'window0')
    return;

  const lazy = {};
  ChromeUtils.defineESModuleGetters(lazy, {
    BrowserGlue: "resource:///modules/BrowserGlue.sys.mjs"
  });

  lazy.BrowserGlue.prototype._onQuitRequest =
  function BG__onQuitRequest(aCancelQuit, aQuitType) {

    // If user has already dismissed quit request, then do nothing
    if (aCancelQuit instanceof Ci.nsISupportsPRBool && aCancelQuit.data) {
      return;
    }

    // There are several cases where we won't show a dialog here:
    // 1. There is only 1 tab open in 1 window
    // 2. browser.warnOnQuit == false
    // 3. The browser is currently in Private Browsing mode
    // 4. The browser will be restarted.
    // 5. The user has automatic session restore enabled and
    //    browser.sessionstore.warnOnQuit is not set to true.
    // 6. The user doesn't have automatic session restore enabled
    //    and browser.tabs.warnOnClose is not set to true.
    //
    // Otherwise, we will show the "closing multiple tabs" dialog.
    //
    // aQuitType == "lastwindow" is overloaded. "lastwindow" is used to indicate
    // "the last window is closing but we're not quitting (a non-browser window is open)"
    // and also "we're quitting by closing the last window".

    if (aQuitType == "restart" || aQuitType == "os-restart") {
      return;
    }

    // browser.warnOnQuit is a hidden global boolean to override all quit prompts.
    if (!Services.prefs.getBoolPref("browser.warnOnQuit")) {
      return;
    }

    var windowcount = 0;
    var pagecount = 0;
    let pinnedcount = 0;
    for (let win of BrowserWindowTracker.orderedWindows) {
      if (win.closed) {
        continue;
      }
      windowcount++;
      let tabbrowser = win.gBrowser;
      if (tabbrowser) {
        pinnedcount += tabbrowser.pinnedTabCount; // bis Fx 132 wurde statt pinnedTabCount _numPinnedTabs verwendet
        pagecount += tabbrowser.visibleTabs.length - tabbrowser.pinnedTabCount; // bis Fx 132 wurde statt pinnedTabCount _numPinnedTabs verwendet
      }
    }

    // No windows open so no need for a warning.
    if (!windowcount) {
      return;
    }

    // browser.warnOnQuitShortcut is checked when quitting using the shortcut key.
    // The warning will appear even when only one window/tab is open. For other
    // methods of quitting, the warning only appears when there is more than one
    // window or tab open.
    let shouldWarnForShortcut =
      this._quitSource == "shortcut" &&
      Services.prefs.getBoolPref("browser.warnOnQuitShortcut");
    let shouldWarnForTabs =
      //pagecount >= 2 &&
      Services.prefs.getBoolPref("browser.tabs.warnOnClose");
    if (!shouldWarnForTabs && !shouldWarnForShortcut) {
      return;
    }

    if (!aQuitType) {
      aQuitType = "quit";
    }

    let win = BrowserWindowTracker.getTopWindow();

    // Our prompt for quitting is most important, so replace others.
    win.gDialogBox.replaceDialogIfOpen();

    let titleId = {
    id: "tabbrowser-confirm-close-tabs-title",
    args: { tabCount: pagecount },
   };
   let quitButtonLabelId = "tabbrowser-confirm-close-tabs-button";
   let closeTabButtonLabelId = "tabbrowser-confirm-close-tab-only-button";
   
   let showCloseCurrentTabOption = false;
    if (windowcount > 1) {
      // More than 1 window. Compose our own message based on whether
     // the shortcut warning is on or not.
     if (shouldWarnForShortcut) {
       showCloseCurrentTabOption = true;
       titleId = "tabbrowser-confirm-close-warn-shortcut-title";
       quitButtonLabelId =
        "tabbrowser-confirm-close-windows-warn-shortcut-button";
     } else {
       titleId = {
         id: "tabbrowser-confirm-close-windows-title",
         args: { windowCount: windowcount },
       };
       quitButtonLabelId = "tabbrowser-confirm-close-windows-button";
     }
	        
    } else if (shouldWarnForShortcut) {
       if (win.gBrowser.visibleTabs.length > 1) {
       showCloseCurrentTabOption = true;
       titleId = "tabbrowser-confirm-close-warn-shortcut-title";
       quitButtonLabelId = "tabbrowser-confirm-close-tabs-with-key-button";
     } else {
       titleId = "tabbrowser-confirm-close-tabs-with-key-title";
       quitButtonLabelId = "tabbrowser-confirm-close-tabs-with-key-button";
     }
    }

    // The checkbox label is different depending on whether the shortcut
    // was used to quit or not.
    let checkboxLabelId;
    if (shouldWarnForShortcut) {
      const quitKeyElement = win.document.getElementById("key_quitApplication");
      const quitKey = ShortcutUtils.prettifyShortcut(quitKeyElement);
      checkboxLabelId = {
         id: "tabbrowser-ask-close-tabs-with-key-checkbox",
        args: { quitKey },
      };
    } else {
      checkboxLabelId = "tabbrowser-ask-close-tabs-checkbox";
    }

const [title, quitButtonLabel, checkboxLabel] =
      win.gBrowser.tabLocalization.formatMessagesSync([
      titleId,      
	  quitButtonLabelId,
      checkboxLabelId,
    ]);

 // Only format the "close current tab" message if needed
   let closeTabButtonLabel;
   if (showCloseCurrentTabOption) {
     [closeTabButtonLabel] = win.gBrowser.tabLocalization.formatMessagesSync([
       closeTabButtonLabelId,
     ]);
   }

    let warnOnClose = { value: true };
    let flags;
   if (showCloseCurrentTabOption) {
     // Adds buttons for quit (BUTTON_POS_0), cancel (BUTTON_POS_1), and close current tab (BUTTON_POS_2).
     // Also sets a flag to reorder dialog buttons so that cancel is reordered on Unix platforms.
     flags =
       (Services.prompt.BUTTON_TITLE_IS_STRING * Services.prompt.BUTTON_POS_0 +
         Services.prompt.BUTTON_TITLE_CANCEL * Services.prompt.BUTTON_POS_1 +
         Services.prompt.BUTTON_TITLE_IS_STRING *
           Services.prompt.BUTTON_POS_2) |
       Services.prompt.BUTTON_POS_1_IS_SECONDARY;
       Services.prompt.BUTTON_TITLE_CANCEL * Services.prompt.BUTTON_POS_1;
   } else {
	   // Adds quit and cancel buttons
     flags =
       Services.prompt.BUTTON_TITLE_IS_STRING * Services.prompt.BUTTON_POS_0 +
       Services.prompt.BUTTON_TITLE_CANCEL * Services.prompt.BUTTON_POS_1;
   }

    // 1 Fenster mit höchstens 1 nicht angehefteter Tab
    if (windowcount == 1 && pagecount < 2 && this._quitSource != "shortcut") {
   title.value = "Fenster schließen?";
   quitButtonLabel.value = "Schließen";
  checkboxLabel.value = null;
   }

   
    let buttonPressed = Services.prompt.confirmEx(
      win,
      title.value,
      null,
      flags,
      quitButtonLabel.value,
      null,
      showCloseCurrentTabOption ? closeTabButtonLabel.value : null,
      checkboxLabel.value,
      warnOnClose
    );
		
    // If the user has unticked the box, and has confirmed closing, stop showing
    // the warning.
    if (buttonPressed == 0 && !warnOnClose.value) {
      if (shouldWarnForShortcut) {
        Services.prefs.setBoolPref("browser.warnOnQuitShortcut", false);
      } else {
        Services.prefs.setBoolPref("browser.tabs.warnOnClose", false);
      }
    }
   // Close the current tab if user selected BUTTON_POS_2
   if (buttonPressed === 2) {
     win.gBrowser.removeTab(win.gBrowser.selectedTab);
   }
   
    this._quitSource = "unknown";

    aCancelQuit.data = buttonPressed != 0;
  }

})();