diff --git a/.eslintrc.js b/.eslintrc.js
index 477c656..2209cce 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -9,6 +9,14 @@ module.exports = {
   "plugins": ["mozilla"],
   "extends": ["plugin:mozilla/recommended"], 
 
+  rules: {
+    // experiment files are not ES modules, so we can't use static import
+    "mozilla/use-static-import": "off",
+
+    // We are still experimenting, console messages are ok for now
+    "no-console": "off"
+  },
+
    overrides: [
     {
       files: [".eslintrc.js"],
@@ -17,5 +25,12 @@ module.exports = {
         browser: false,
       },
     },
+    {
+      files: ["*/experiments/*/parent/*.js"],
+      globals: {
+        global: true,
+        Services: true,
+      }
+    }
   ]
 };
diff --git a/NotificationBox/NotificationBox/implementation.js b/NotificationBox/NotificationBox/implementation.js
index 219a95b..1a6027d 100644
--- a/NotificationBox/NotificationBox/implementation.js
+++ b/NotificationBox/NotificationBox/implementation.js
@@ -99,7 +99,7 @@
           const parts = cssPropertyName.split("-");
           return (
             // check if first part is in whitelist
-            parts.length > 0 &&
+            !!parts.length &&
             allowedCssPropNames.includes(parts[0]) &&
             // validate second part (if any) being a simple word
             (parts.length == 1 ||
diff --git a/NotificationBox/background.js b/NotificationBox/background.js
index e495bed..e1207e1 100644
--- a/NotificationBox/background.js
+++ b/NotificationBox/background.js
@@ -6,9 +6,9 @@ messenger.NotificationBox.onButtonClicked.addListener((windowId, notificationId,
   if (["btn-keep"].includes(buttonId)) {
     console.log("Box will not close, as long as one listener returns {close:false}.");
     return { close: false };
-  } else {
+  } 
     return { close: true };
-  }
+  
 });
 
 // Defining another onButtonClicked listener
diff --git a/calendar/experiments/calendar/ext-calendar-utils.sys.mjs b/calendar/experiments/calendar/ext-calendar-utils.sys.mjs
index 08cca19..e46829a 100644
--- a/calendar/experiments/calendar/ext-calendar-utils.sys.mjs
+++ b/calendar/experiments/calendar/ext-calendar-utils.sys.mjs
@@ -2,9 +2,7 @@
  * 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/. */
 
-var {
-  ExtensionUtils: { ExtensionError, promiseEvent }
-} = ChromeUtils.importESModule("resource://gre/modules/ExtensionUtils.sys.mjs");
+var { ExtensionUtils: { ExtensionError, promiseEvent } } = ChromeUtils.importESModule("resource://gre/modules/ExtensionUtils.sys.mjs");
 
 var { cal } = ChromeUtils.importESModule("resource:///modules/calendar/calUtils.sys.mjs");
 var { CalEvent } = ChromeUtils.importESModule("resource:///modules/CalEvent.sys.mjs");
diff --git a/calendar/experiments/calendar/parent/ext-calendar-calendars.js b/calendar/experiments/calendar/parent/ext-calendar-calendars.js
index a39a481..44b1000 100644
--- a/calendar/experiments/calendar/parent/ext-calendar-calendars.js
+++ b/calendar/experiments/calendar/parent/ext-calendar-calendars.js
@@ -2,12 +2,8 @@
  * 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/. */
 
-var {
-  ExtensionCommon: { ExtensionAPI, EventManager }
-} = ChromeUtils.importESModule("resource://gre/modules/ExtensionCommon.sys.mjs");
-var {
-  ExtensionUtils: { ExtensionError }
-} = ChromeUtils.importESModule("resource://gre/modules/ExtensionUtils.sys.mjs");
+var { ExtensionCommon: { ExtensionAPI, EventManager } } = ChromeUtils.importESModule("resource://gre/modules/ExtensionCommon.sys.mjs");
+var { ExtensionUtils: { ExtensionError } } = ChromeUtils.importESModule("resource://gre/modules/ExtensionUtils.sys.mjs");
 
 var { cal } = ChromeUtils.importESModule("resource:///modules/calendar/calUtils.sys.mjs");
 
@@ -23,7 +19,7 @@ this.calendar_calendars = class extends ExtensionAPI {
     return {
       calendar: {
         calendars: {
-          query: async function({ type, url, name, color, readOnly, enabled }) {
+          async query({ type, url, name, color, readOnly, enabled }) {
             let calendars = cal.manager.getCalendars();
 
             let pattern = null;
@@ -68,7 +64,7 @@ this.calendar_calendars = class extends ExtensionAPI {
               })
               .map(calendar => convertCalendar(context.extension, calendar));
           },
-          get: async function(id) {
+          async get(id) {
             // TODO find a better way to determine cache id
             if (id.endsWith("#cache")) {
               let calendar = unwrapCalendar(cal.manager.getCalendarById(id.substring(0, id.length - 6)));
@@ -79,7 +75,7 @@ this.calendar_calendars = class extends ExtensionAPI {
               return convertCalendar(context.extension, calendar);
             }
           },
-          create: async function(createProperties) {
+          async create(createProperties) {
             let calendar = cal.manager.createCalendar(
               createProperties.type,
               Services.io.newURI(createProperties.url)
@@ -98,7 +94,7 @@ this.calendar_calendars = class extends ExtensionAPI {
             calendar = cal.manager.getCalendarById(calendar.id);
             return convertCalendar(context.extension, calendar);
           },
-          update: async function(id, updateProperties) {
+          async update(id, updateProperties) {
             let calendar = cal.manager.getCalendarById(id);
             if (!calendar) {
               throw new ExtensionError(`Invalid calendar id: ${id}`);
@@ -141,7 +137,7 @@ this.calendar_calendars = class extends ExtensionAPI {
               }
             }
           },
-          remove: async function(id) {
+          async remove(id) {
             let calendar = cal.manager.getCalendarById(id);
             if (!calendar) {
               throw new ExtensionError(`Invalid calendar id: ${id}`);
@@ -149,7 +145,7 @@ this.calendar_calendars = class extends ExtensionAPI {
 
             cal.manager.unregisterCalendar(calendar);
           },
-          clear: async function(id) {
+          async clear(id) {
             if (!id.endsWith("#cache")) {
               throw new ExtensionError("Cannot clear non-cached calendar");
             }
@@ -179,7 +175,7 @@ this.calendar_calendars = class extends ExtensionAPI {
             calendar.wrappedJSObject.mObservers.notify("onLoad", [calendar]);
           },
 
-          synchronize: function(ids) {
+          synchronize(ids) {
             let calendars = [];
             if (ids) {
               if (!Array.isArray(ids)) {
diff --git a/calendar/experiments/calendar/parent/ext-calendar-items.js b/calendar/experiments/calendar/parent/ext-calendar-items.js
index 73e349e..aa9101b 100644
--- a/calendar/experiments/calendar/parent/ext-calendar-items.js
+++ b/calendar/experiments/calendar/parent/ext-calendar-items.js
@@ -2,12 +2,8 @@
  * 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/. */
 
-var {
-  ExtensionCommon: { ExtensionAPI, EventManager }
-} = ChromeUtils.importESModule("resource://gre/modules/ExtensionCommon.sys.mjs");
-var {
-  ExtensionUtils: { ExtensionError }
-} = ChromeUtils.importESModule("resource://gre/modules/ExtensionUtils.sys.mjs");
+var { ExtensionCommon: { ExtensionAPI, EventManager } } = ChromeUtils.importESModule("resource://gre/modules/ExtensionCommon.sys.mjs");
+var { ExtensionUtils: { ExtensionError } } = ChromeUtils.importESModule("resource://gre/modules/ExtensionUtils.sys.mjs");
 
 var { cal } = ChromeUtils.importESModule("resource:///modules/calendar/calUtils.sys.mjs");
 
@@ -26,7 +22,7 @@ this.calendar_items = class extends ExtensionAPI {
     return {
       calendar: {
         items: {
-          query: async function(queryProps) {
+          async query(queryProps) {
             let calendars = [];
             if (typeof queryProps.calendarId == "string") {
               calendars = [getResolvedCalendarById(context.extension, queryProps.calendarId)];
@@ -64,12 +60,12 @@ this.calendar_items = class extends ExtensionAPI {
 
             return calendarItems.flat().map(item => convertItem(item, queryProps, context.extension));
           },
-          get: async function(calendarId, id, options) {
+          async get(calendarId, id, options) {
             let calendar = getResolvedCalendarById(context.extension, calendarId);
             let item = await calendar.getItem(id);
             return convertItem(item, options, context.extension);
           },
-          create: async function(calendarId, createProperties) {
+          async create(calendarId, createProperties) {
             let calendar = getResolvedCalendarById(context.extension, calendarId);
             let item = propsToItem(createProperties);
             item.calendar = calendar.superCalendar;
@@ -88,7 +84,7 @@ this.calendar_items = class extends ExtensionAPI {
 
             return convertItem(createdItem, createProperties, context.extension);
           },
-          update: async function(calendarId, id, updateProperties) {
+          async update(calendarId, id, updateProperties) {
             let calendar = getResolvedCalendarById(context.extension, calendarId);
 
             let oldItem = await calendar.getItem(id);
@@ -112,7 +108,7 @@ this.calendar_items = class extends ExtensionAPI {
             let modifiedItem = await calendar.modifyItem(newItem, oldItem);
             return convertItem(modifiedItem, updateProperties, context.extension);
           },
-          move: async function(fromCalendarId, id, toCalendarId) {
+          async move(fromCalendarId, id, toCalendarId) {
             if (fromCalendarId == toCalendarId) {
               return;
             }
@@ -135,7 +131,7 @@ this.calendar_items = class extends ExtensionAPI {
             await toCalendar.addItem(item);
             await fromCalendar.deleteItem(item);
           },
-          remove: async function(calendarId, id) {
+          async remove(calendarId, id) {
             let calendar = getResolvedCalendarById(context.extension, calendarId);
 
             let item = await calendar.getItem(id);
diff --git a/calendar/experiments/calendar/parent/ext-calendar-provider.js b/calendar/experiments/calendar/parent/ext-calendar-provider.js
index 550dbfc..41ac2d8 100644
--- a/calendar/experiments/calendar/parent/ext-calendar-provider.js
+++ b/calendar/experiments/calendar/parent/ext-calendar-provider.js
@@ -2,9 +2,7 @@
  * 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/. */
 
-var {
-  ExtensionCommon: { ExtensionAPI, EventManager }
-} = ChromeUtils.importESModule("resource://gre/modules/ExtensionCommon.sys.mjs");
+var { ExtensionCommon: { ExtensionAPI, EventManager } } = ChromeUtils.importESModule("resource://gre/modules/ExtensionCommon.sys.mjs");
 
 var { cal } = ChromeUtils.importESModule("resource:///modules/calendar/calUtils.sys.mjs");
 var { ExtensionSupport } = ChromeUtils.importESModule("resource:///modules/ExtensionSupport.sys.mjs");
@@ -484,9 +482,7 @@ this.calendar_provider = class extends ExtensionAPI {
             }
 
             loadPromise.then(() => {
-              browser.fixupAndLoadURIString(calendarType.panelSrc, {
-                triggeringPrincipal: this.extension.principal
-              });
+              browser.fixupAndLoadURIString(calendarType.panelSrc, { triggeringPrincipal: this.extension.principal });
             });
 
             win.gButtonHandlers.forNodeId["panel-addon-calendar-settings"].accept = calendarType.onCreated;
@@ -522,7 +518,7 @@ this.calendar_provider = class extends ExtensionAPI {
       .getProtocolHandler("resource")
       .QueryInterface(Ci.nsIResProtocolHandler)
       .setSubstitution("tb-experiments-calendar", null);
-    Services.obs.notifyObservers(null, "startupcache-invalidate", null);
+    Services.obs.notifyObservers(null, "startupcache-invalidate");
   }
 
   onManifestEntry(entryName) {
diff --git a/calendar/experiments/calendar/parent/ext-calendarItemAction.js b/calendar/experiments/calendar/parent/ext-calendarItemAction.js
index 28ccec4..5e4df44 100644
--- a/calendar/experiments/calendar/parent/ext-calendarItemAction.js
+++ b/calendar/experiments/calendar/parent/ext-calendarItemAction.js
@@ -37,7 +37,7 @@ this.calendarItemAction = class extends ToolbarButtonAPI {
     // TODO this is only necessary in the experiment, can refactor this when moving to core.
     ExtensionSupport.registerWindowListener("ext-calendar-itemAction-" + this.extension.id, {
       chromeURLs: ["chrome://calendar/content/calendar-event-dialog.xhtml"],
-      onLoadWindow: function(win) {
+      onLoadWindow(win) {
         let { document } = win;
 
         if (!document.getElementById("mainPopupSet")) {
diff --git a/calendar/experiments/calendar/parent/ext-calendarItemDetails.js b/calendar/experiments/calendar/parent/ext-calendarItemDetails.js
index f2e039a..32c2e4d 100644
--- a/calendar/experiments/calendar/parent/ext-calendarItemDetails.js
+++ b/calendar/experiments/calendar/parent/ext-calendarItemDetails.js
@@ -2,9 +2,7 @@
  * 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/. */
 
-var {
-  ExtensionCommon: { ExtensionAPI, makeWidgetId }
-} = ChromeUtils.importESModule("resource://gre/modules/ExtensionCommon.sys.mjs");
+var { ExtensionCommon: { ExtensionAPI, makeWidgetId } } = ChromeUtils.importESModule("resource://gre/modules/ExtensionCommon.sys.mjs");
 
 var { ExtensionSupport } = ChromeUtils.importESModule("resource:///modules/ExtensionSupport.sys.mjs");
 
@@ -16,7 +14,7 @@ this.calendarItemDetails = class extends ExtensionAPI {
     if (this.extension.manifest.calendar_item_details) {
       let panelFrame;
       if (window.tabmail) {
-        panelFrame = window.document.getElementById(iframeId|| tabmail.currentTabInfo.iframe?.id);
+        panelFrame = window.document.getElementById(iframeId || window.tabmail.currentTabInfo.iframe?.id);
       } else {
         panelFrame = window.document.getElementById("calendar-item-panel-iframe");
       }
@@ -45,9 +43,7 @@ this.calendarItemDetails = class extends ExtensionAPI {
         let loadPromise = setupE10sBrowser(this.extension, browser, tabpanel);
 
         return loadPromise.then(() => {
-          browser.fixupAndLoadURIString(this.extension.manifest.calendar_item_details.default_content, {
-            triggeringPrincipal: this.extension.principal
-          });
+          browser.fixupAndLoadURIString(this.extension.manifest.calendar_item_details.default_content, { triggeringPrincipal: this.extension.principal });
         });
       });
     }