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diff --git a/devtools/client/performance-new/popup/logic.sys.mjs b/devtools/client/performance-new/popup/logic.sys.mjs
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+++ b/devtools/client/performance-new/popup/logic.sys.mjs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * 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/. */
+// @ts-check
+
+/**
+ * This file controls the logic of the profiler popup view.
+ */
+
+/**
+ * @typedef {ReturnType<typeof selectElementsInPanelview>} Elements
+ * @typedef {ReturnType<typeof createViewControllers>} ViewController
+ */
+
+/**
+ * @typedef {Object} State - The mutable state of the popup.
+ * @property {Array<() => void>} cleanup - Functions to cleanup once the view is hidden.
+ * @property {boolean} isInfoCollapsed
+ */
+
+import { createLazyLoaders } from "resource://devtools/client/performance-new/shared/typescript-lazy-load.sys.mjs";
+
+const lazy = createLazyLoaders({
+  PanelMultiView: () =>
+    ChromeUtils.importESModule("resource:///modules/PanelMultiView.sys.mjs"),
+  Background: () =>
+    ChromeUtils.importESModule(
+      "resource://devtools/client/performance-new/shared/background.sys.mjs"
+    ),
+});
+
+/**
+ * This function collects all of the selection of the elements inside of the panel.
+ *
+ * @param {XULElement} panelview
+ */
+function selectElementsInPanelview(panelview) {
+  const document = panelview.ownerDocument;
+  /**
+   * Get an element or throw an error if it's not found. This is more friendly
+   * for TypeScript.
+   *
+   * @param {string} id
+   * @return {HTMLElement}
+   */
+  function getElementById(id) {
+    /** @type {HTMLElement | null} */
+    // @ts-ignore - Bug 1674368
+    const { PanelMultiView } = lazy.PanelMultiView();
+    const element = PanelMultiView.getViewNode(document, id);
+    if (!element) {
+      throw new Error(`Could not find the element from the ID "${id}"`);
+    }
+    return element;
+  }
+
+  // Forcefully cast the window to the type ChromeWindow.
+  /** @type {any} */
+  const chromeWindowAny = document.defaultView;
+  /** @type {ChromeWindow} */
+  const chromeWindow = chromeWindowAny;
+
+  return {
+    document,
+    panelview,
+    window: chromeWindow,
+    inactive: getElementById("PanelUI-profiler-inactive"),
+    active: getElementById("PanelUI-profiler-active"),
+    presetDescription: getElementById("PanelUI-profiler-content-description"),
+    presetsEditSettings: getElementById(
+      "PanelUI-profiler-content-edit-settings"
+    ),
+    presetsMenuList: /** @type {MenuListElement} */ (
+      getElementById("PanelUI-profiler-presets")
+    ),
+    header: getElementById("PanelUI-profiler-header"),
+    info: getElementById("PanelUI-profiler-info"),
+    menupopup: getElementById("PanelUI-profiler-presets-menupopup"),
+    infoButton: getElementById("PanelUI-profiler-info-button"),
+    learnMore: getElementById("PanelUI-profiler-learn-more"),
+    startRecording: getElementById("PanelUI-profiler-startRecording"),
+    stopAndDiscard: getElementById("PanelUI-profiler-stopAndDiscard"),
+    stopAndCapture: getElementById("PanelUI-profiler-stopAndCapture"),
+    settingsSection: getElementById("PanelUI-profiler-content-settings"),
+    contentRecording: getElementById("PanelUI-profiler-content-recording"),
+  };
+}
+
+/**
+ * This function returns an interface that can be used to control the view of the
+ * panel based on the current mutable State.
+ *
+ * @param {State} state
+ * @param {Elements} elements
+ */
+function createViewControllers(state, elements) {
+  return {
+    updateInfoCollapse() {
+      const { header, info, infoButton } = elements;
+      header.setAttribute(
+        "isinfocollapsed",
+        state.isInfoCollapsed ? "true" : "false"
+      );
+      // @ts-ignore - Bug 1674368
+      infoButton.checked = !state.isInfoCollapsed;
+
+      if (state.isInfoCollapsed) {
+        const { height } = info.getBoundingClientRect();
+        info.style.marginBlockEnd = `-${height}px`;
+      } else {
+        info.style.marginBlockEnd = "0";
+      }
+    },
+
+    updatePresets() {
+      const { presets, getRecordingSettings } = lazy.Background();
+      const { presetName } = getRecordingSettings(
+        "aboutprofiling",
+        Services.profiler.GetFeatures()
+      );
+      const preset = presets[presetName];
+      if (preset) {
+        elements.presetDescription.style.display = "block";
+        elements.document.l10n.setAttributes(
+          elements.presetDescription,
+          preset.l10nIds.popup.description
+        );
+        elements.presetsMenuList.value = presetName;
+      } else {
+        elements.presetDescription.style.display = "none";
+        // We don't remove the l10n-id attribute as the element is hidden anyway.
+        // It will be updated again when it's displayed next time.
+        elements.presetsMenuList.value = "custom";
+      }
+    },
+
+    updateProfilerState() {
+      if (Services.profiler.IsActive()) {
+        elements.inactive.hidden = true;
+        elements.active.hidden = false;
+        elements.settingsSection.hidden = true;
+        elements.contentRecording.hidden = false;
+      } else {
+        elements.inactive.hidden = false;
+        elements.active.hidden = true;
+        elements.settingsSection.hidden = false;
+        elements.contentRecording.hidden = true;
+      }
+    },
+
+    createPresetsList() {
+      // Check the DOM if the presets were built or not. We can't cache this value
+      // in the `State` object, as the `State` object will be removed if the
+      // button is removed from the toolbar, but the DOM changes will still persist.
+      if (elements.menupopup.getAttribute("presetsbuilt") === "true") {
+        // The presets were already built.
+        return;
+      }
+
+      const { presets } = lazy.Background();
+      const currentPreset = Services.prefs.getCharPref(
+        "devtools.performance.recording.preset"
+      );
+
+      const menuitems = Object.entries(presets).map(([id, preset]) => {
+        const { document, presetsMenuList } = elements;
+        const menuitem = document.createXULElement("menuitem");
+        document.l10n.setAttributes(menuitem, preset.l10nIds.popup.label);
+        menuitem.setAttribute("value", id);
+        if (id === currentPreset) {
+          presetsMenuList.setAttribute("value", id);
+        }
+        return menuitem;
+      });
+
+      elements.menupopup.prepend(...menuitems);
+      elements.menupopup.setAttribute("presetsbuilt", "true");
+    },
+
+    hidePopup() {
+      const panel = elements.panelview.closest("panel");
+      if (!panel) {
+        throw new Error("Could not find the panel from the panelview.");
+      }
+      /** @type {any} */ (panel).hidePopup();
+    },
+  };
+}
+
+/**
+ * Perform all of the business logic to present the popup view once it is open.
+ *
+ * @param {State} state
+ * @param {Elements} elements
+ * @param {ViewController} view
+ */
+function initializeView(state, elements, view) {
+  view.createPresetsList();
+
+  state.cleanup.push(() => {
+    // The UI should be collapsed by default for the next time the popup
+    // is open.
+    state.isInfoCollapsed = true;
+    view.updateInfoCollapse();
+  });
+
+  // Turn off all animations while initializing the popup.
+  elements.header.setAttribute("animationready", "false");
+
+  elements.window.requestAnimationFrame(() => {
+    // Allow the elements to layout once, the updateInfoCollapse implementation measures
+    // the size of the container. It needs to wait a second before the bounding box
+    // returns an actual size.
+    view.updateInfoCollapse();
+    view.updateProfilerState();
+    view.updatePresets();
+
+    // Now wait for another rAF, and turn the animations back on.
+    elements.window.requestAnimationFrame(() => {
+      elements.header.setAttribute("animationready", "true");
+    });
+  });
+}
+
+/**
+ * This function is in charge of settings all of the events handlers for the view.
+ * The handlers must also add themselves to the `state.cleanup` for them to be
+ * properly cleaned up once the view is destroyed.
+ *
+ * @param {State} state
+ * @param {Elements} elements
+ * @param {ViewController} view
+ */
+function addPopupEventHandlers(state, elements, view) {
+  const { changePreset, startProfiler, stopProfiler, captureProfile } =
+    lazy.Background();
+
+  /**
+   * Adds a handler that automatically is removed once the panel is hidden.
+   *
+   * @param {HTMLElement} element
+   * @param {string} type
+   * @param {(event: Event) => void} handler
+   */
+  function addHandler(element, type, handler) {
+    element.addEventListener(type, handler);
+    state.cleanup.push(() => {
+      element.removeEventListener(type, handler);
+    });
+  }
+
+  addHandler(elements.infoButton, "click", event => {
+    // Any button command event in the popup will cause it to close. Prevent this
+    // from happening on click.
+    event.preventDefault();
+
+    state.isInfoCollapsed = !state.isInfoCollapsed;
+    view.updateInfoCollapse();
+  });
+
+  addHandler(elements.startRecording, "click", () => {
+    startProfiler("aboutprofiling");
+  });
+
+  addHandler(elements.stopAndDiscard, "click", () => {
+    stopProfiler();
+  });
+
+  addHandler(elements.stopAndCapture, "click", () => {
+    captureProfile("aboutprofiling");
+    view.hidePopup();
+  });
+
+  addHandler(elements.learnMore, "click", () => {
+    elements.window.openWebLinkIn("https://profiler.firefox.com/docs/", "tab");
+    view.hidePopup();
+  });
+
+  addHandler(elements.presetsMenuList, "command", () => {
+    changePreset(
+      "aboutprofiling",
+      elements.presetsMenuList.value,
+      Services.profiler.GetFeatures()
+    );
+    view.updatePresets();
+  });
+
+  addHandler(elements.presetsEditSettings, "click", () => {
+    elements.window.openTrustedLinkIn("about:profiling", "tab");
+    view.hidePopup();
+  });
+
+  // Update the view when the profiler starts/stops.
+  // These are all events that can affect the current state of the profiler.
+  const events = ["profiler-started", "profiler-stopped"];
+  for (const event of events) {
+    Services.obs.addObserver(view.updateProfilerState, event);
+    state.cleanup.push(() => {
+      Services.obs.removeObserver(view.updateProfilerState, event);
+    });
+  }
+}
+
+/**
+ * Initialize everything needed for the popup to work fine.
+ * @param {State} panelState
+ * @param {XULElement} panelview
+ */
+export function initializePopup(panelState, panelview) {
+  const panelElements = selectElementsInPanelview(panelview);
+  const panelviewControllers = createViewControllers(panelState, panelElements);
+  addPopupEventHandlers(panelState, panelElements, panelviewControllers);
+  initializeView(panelState, panelElements, panelviewControllers);
+}