editbookmarkstree.uc.js

// 'Expand Edit Bookmarks Popup' script for Firefox 60+ by Aris
// option: increase folder tree height
// option: hide preview image

var folder_tree_height = "240px"; // increase folder tree height
var hide_preview_image = false; // hide (true) or show (false) preview image

var EditBookmarkPanelTweaks = {
    init: function () {

        try {

            document.getElementById('editBookmarkPanel').addEventListener("popupshown", function () {

                gEditItemOverlay.toggleFolderTreeVisibility();

            }, false);

            var sss = Components.classes["@mozilla.org/content/style-sheet-service;1"].getService(Components.interfaces.nsIStyleSheetService);

            var hide_preview_image_code = '';

            if (hide_preview_image)
                hide_preview_image_code = ' \
        #editBookmarkPanelImage, #editBookmarkPanelFaviconContainer, #editBookmarkPanel html { \
          display: none !important; \
        } \
      ';

            var uri = Services.io.newURI("data:text/css;charset=utf-8," + encodeURIComponent(' \
        \
        #editBookmarkPanel {\
          transition: unset !important; \
        } \
        #editBMPanel_folderTree {\
          min-height: '+ folder_tree_height + ' !important; \
        } \
        '+ hide_preview_image_code + ' \
        \
    '), null, null);

            // remove old style sheet
            if (sss.sheetRegistered(uri, sss.AGENT_SHEET)) sss.unregisterSheet(uri, sss.AGENT_SHEET);

            sss.loadAndRegisterSheet(uri, sss.AGENT_SHEET);

        } catch (e) { }

    }
}

document.addEventListener("DOMContentLoaded", EditBookmarkPanelTweaks.init(), false);