diff --git a/.github/codecov.yml b/.github/codecov.yml
index 24e2f3f..3e4fa1e 100644
--- a/.github/codecov.yml
+++ b/.github/codecov.yml
@@ -1,10 +1,18 @@
-coverage:
-  status:
-    project:
-      src:
+comment:
+  layout: "header, components"
+
+component_management:
+  default_rules:
+    statuses:
+      - type: project
         informational: true
-        paths: ["src/**/*", "!src/test/**/*"]
-    patch:
-      src:
+      - type: patch
         informational: true
-        paths: ["src/**/*", "!src/test/**/*"]
+
+  individual_components:
+    - component_id: app
+      paths: ["src/app**"]
+    - component_id: ghosttext
+      paths: ["src/ghosttext**"]
+    - component_id: infra
+      paths: ["src/**", "!src/app**", "!src/ghosttext**", "!src/test/**", "!src/util/**"]
diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 50803a2..6c90c2c 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -1,14 +1,13 @@
 
 
+____
+
 * [ ] I agree that my contributions will be [dual-licensed under (MPL-2.0 OR GPL-3.0-or-later)](https://github.com/exteditor/ghostbird/blob/main/LICENSE).
 
-## What kind of change does this PR introduce?
+____
 
-- [ ] New feature
-- [ ] Bugfix
-- [ ] Documentation
-- [ ] Typo fix
-- [ ] Other
+<!-- This instructs let CodeRabbit generate summary -->
+@coderabbitai
 
 ## What is the current behavior?
 
diff --git a/.github/site/coverpage.md b/.github/site/coverpage.md
new file mode 100644
index 0000000..7614fc4
--- /dev/null
+++ b/.github/site/coverpage.md
@@ -0,0 +1,13 @@
+
+![logo](../ext/blue.svg)
+
+# Ghostbird
+
+> Compose email in your favorite text editor
+>
+> <video alt="logo" src="https://github.com/user-attachments/assets/150ef991-10b8-45e2-bb2c-690f1b45a7ea" controls muted style="max-width: min(30rem, 90vw)">
+
+[GitHub](https://github.com/exteditor/ghostbird/#readme)
+[Codeberg](https://codeberg.org/exteditor/ghostbird#readme)
+[GitLab](https://gitlab.com/exteditor/ghostbird#readme)
+[Installation](#installation)
diff --git a/.github/site/homepage.md b/.github/site/homepage.md
new file mode 100644
index 0000000..4c83f00
--- /dev/null
+++ b/.github/site/homepage.md
@@ -0,0 +1,151 @@
+# Ghostbird: GhostText for Thunderbird
+
+[![Supports Thunderbird ESR](https://img.shields.io/badge/supports-Thunderbird_140_ESR-0a84ff?logo=thunderbird&logoSize=auto)][tb]
+[![Latest release](https://img.shields.io/github/v/release/exteditor/ghostbird?include_prereleases&logo=refinedgithub&logoColor=white&logoSize=auto)][rels]
+
+[![Download on AMO](https://raw.githubusercontent.com/thunderbird/webext-support/refs/heads/master/images/get-the-addon.svg)](#installation)
+
+Ghostbird is an Thunderbird add-on that lets you compose your emails in your favorite text editor - Vim, Neovim, VS Code, Sublime Text, Emacs, or any other editor with a GhostText add-on installed.
+
+## Requirements
+
+* [Thunderbird 140][tb] (We will mainly support the latest ESR)
+* A text editor that has a GhostText server add-on installed and running:
+
+  [![Sublime Text][sublimetext-svg]](https://sublime.wbond.net/packages/GhostText)
+  [<img width="48" height="48" alt="VSCodium" title="VSCodium" src="https://raw.githubusercontent.com/VSCodium/vscodium.github.io/refs/heads/master/img/codium_cnl.svg" >](https://open-vsx.org/extension/fregante/ghost-text)
+  [![Visual Studio Code][vscode-svg]](https://marketplace.visualstudio.com/items?itemName=fregante.ghost-text)
+  [![GNU Emacs][emacs-svg]](https://melpa.org/#/atomic-chrome)
+  [![Vim][vim-svg]][vimghost]
+  [![Neovim][nvim-svg]](https://github.com/subnut/nvim-ghost.nvim)
+  [<img src="https://9fans.github.io/plan9port/dist/spaceglenda100.png" width="48" height="48" alt="Acme" title="Acme">](https://github.com/fhs/Ghost)
+  [<img src="https://github.com/user-attachments/assets/b0ca34ed-5508-458f-b7af-2642824bf7f7" width="48" height="48" alt="Helix" title="Helix">][helix]
+  [`$ANY_EDITOR`](https://github.com/newsch/GhostText-Any/)
+
+  The last two implementations can wrap any editor that blocks while editing.
+
+## Installation
+
+[<img src="./ext/blue.svg" width="48" height="48" border="1" align="right" alt="logo" title="Grey-headed bushshrike (Malaconotus blanchoti) is sometimes called 'ghostbird'">][bird]
+
+* See [the help page in the Mozilla Support Center](https://support.mozilla.org/kb/installing-addon-thunderbird) for details.
+
+You can install Ghostbird in several ways:
+
+### Install within Thunderbird (Recommended)
+
+1. In Thunderbird, open `Add-ons Manager`.
+2. Search for "Ghostbird".
+3. Click the <kbd>+ Add to Thunderbird</kbd> button.
+
+### Download and install manually
+
+1. Download the latest release from the [Thunderbird add-on website][amo] or [GitHub Releases][rels].
+2. In Thunderbird, go to `Add-ons Manager`.
+3. Drag and drop the downloaded `.xpi` file into the `Add-ons Manager` window.
+
+Alternatively, you can:
+
+3. Press :gear: button at the top-right.
+4. Select `Install Add-on From File...` from the menu.
+5. Select downloaded `.xpi` file.
+
+### Build from source
+
+* Basically, running `make` will do, which is roughly equivalent to `yarn install && yarn build`.
+* See [CONTRIBUTING.md](./CONTRIBUTING.md) to get started.
+
+## Usage
+
+1. Launch your favorite text editor.
+2. Start the GhostText server in your text editor (e.g., with `:GhostTextStart` in Vim).
+3. Press the gray Ghostbird button <img alt="Gray button" src="./ext/gray.svg" width="24" height="24" border="1"> in the Thunderbird mail compose window. (The default shortcut is <kbd>^Ctrl</kbd>+<kbd>⇧Shift</kbd>+<kbd>H</kbd>)
+   * If the connection is successful, the button will turn blue <img alt="Blue button" src="./ext/blue.svg" width="24" height="24" border="1">.
+   * If the connection fails, the button will turn red <img alt="Red button" src="./ext/red.svg" width="24" height="24" border="1">. Make sure that the GhostText server is listening. See [Troubleshooting page of original GhostText](https://ghosttext.fregante.com/troubleshooting/#unable-to-connect).
+4. Write your email in the text editor.
+5. Close your text editor to stop Ghostbird.
+
+* Example using [Vim-Ghost][vimghost]
+
+  [vimghost.webm](https://github.com/user-attachments/assets/150ef991-10b8-45e2-bb2c-690f1b45a7ea)
+
+* Example using Notepad++ via GhostText-Any
+
+  <img width="600" height="302" alt="Screenshot using Notepad++ with GhostText-Any" src="https://github.com/user-attachments/assets/a4f92beb-a6f2-4a67-ae94-aa02af64539e" />
+
+## How it works
+
+* See [design.md](./doc/design.md) for details.
+
+## Roadmap
+
+* See [README.md](./README.md).
+* See also [a list of milestones][milestones].
+
+## Contributing
+
+If you like the idea, please:
+
+* [Star the repo](https://github.com/exteditor/ghostbird/#repository-container-header).
+* [Rate the add-on][review].
+* Feel free to open issues and submit pull requests. See [CONTRIBUTING.md](./CONTRIBUTING.md) to get started.
+* See our [milestones page][milestones] or [issues](https://github.com/exteditor/ghostbird/issues) for tasks you can contribute to, and use the [Discussions](https://github.com/exteditor/ghostbird/discussions) page for general discussions.
+
+## FAQ
+
+### Is it safe to use?
+
+* I'd say yes, but save your work frequently since it may contain bugs and eat your email.
+* This add-on does not collect any personal data and can only connect to localhost. Attempts to send any data to external servers are blocked by Thunderbird's security model.
+* You can look inside the released `.xpi` files (which are just zip files) to verify that they match the build from the source code.
+* As for trustworthiness, the safest option is to wait until it reaches 1.0.0, as that indicates it has passed Mozilla's manual review.
+
+### Why not just fork the original GhostText add-on, or contribute to it?
+
+* See [faq.md](./doc/faq.md#why).
+
+### How do I set up a development environment?
+
+* See [CONTRIBUTING.md](./CONTRIBUTING.md) for details on the development workflow.
+
+### How do I troubleshoot connection issues?
+
+* Make sure that the GhostText server is listening. See the [Troubleshooting page of original GhostText](https://ghosttext.fregante.com/troubleshooting/#unable-to-connect).
+
+### How do I switch between HTML mode and Plain Text mode?
+
+* See [doc/faq.md](./doc/faq.md#mode).
+
+### How can I support the project?
+
+Please consider the following options:
+
+* [Star the repo](https://github.com/exteditor/ghostbird/#repository-container-header)
+* [Rate the add-on][review]
+* [Donate to Thunderbird](https://www.thunderbird.net/en-US/donate/) (It's financially separate from Firefox)
+* [Donate to @fregante, the author of the original GhostText](https://github.com/sponsors/fregante)
+* [Contribute to the development](./CONTRIBUTING.md)
+
+If you've looked at the options above and still want to motivate the maintainer [@snipsnipsnip](https://github.com/snipsnipsnip) specifically, you can tip some [ETH](https://gist.githubusercontent.com/snipsnipsnip/d0b0bd12045060c8f71fbc9ea936d886/raw/a840747caa6cac61d0bd3b59145e6ed7e9daf14f/eth.json).
+
+## Credits
+
+* [Federico Brigante](https://fregante.com/), the author of [GhostText][gt].
+* [Alexandre Feblot](https://github.com/afeblot), the original author of [External Editor](https://github.com/exteditor/exteditor/), which I took over maintaining; it is now in a stale state. I intend to incorporate some of its features into Ghostbird.
+* The button image is based on a [photo](https://commons.wikimedia.org/wiki/File:Grey-headed_Bushshrike_(Malaconotus_blanchoti)_in_tree,_crop.jpg) of a [Grey-headed Bushshrike][bird] by [Patty McGann](https://www.flickr.com/photos/10374910@N08/3093177192/) (CC-BY-2.0).
+
+[proj]: https://github.com/exteditor/ghostbird/projects
+[milestones]: https://github.com/exteditor/ghostbird/milestones
+[tb]: https://www.thunderbird.net/download/esr/
+[gt]: https://ghosttext.fregante.com/
+[helix]: https://github.com/rahji/helix-ghost
+[rels]: https://github.com/exteditor/ghostbird/releases
+[sublimetext-svg]: ./doc/res/sublimetext.svg
+[vscode-svg]: ./doc/res/vscode.svg
+[emacs-svg]: ./doc/res/emacs.svg
+[vim-svg]: ./doc/res/vim.svg
+[nvim-svg]: ./doc/res/nvim.svg
+[bird]: https://en.wikipedia.org/wiki/Grey-headed_bushshrike
+[amo]: https://addons.thunderbird.net/addon/ghostbird/
+[vimghost]: https://github.com/raghur/vim-ghost
+[review]: https://addons.thunderbird.net/en-US/thunderbird/addon/ghostbird/reviews/add
diff --git a/.github/site/index.html b/.github/site/index.html
new file mode 100644
index 0000000..3ba9cfd
--- /dev/null
+++ b/.github/site/index.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Ghostbird: GhostText for Thunderbird</title>
+  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
+  <meta name="description" content="Ghostbird is a Thunderbird add-on that connects your text editor with Thunderbird's email compose window, allowing you to edit the message in the text editor.">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0">
+  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify@4.13.1/lib/themes/vue.min.css">
+  <link rel="icon" href="ext/blue.svg" />
+  <script type="module" src="index.mjs"></script>
+</head>
+<body>
+  <div id="app"></div>
+</body>
+</html>
diff --git a/.github/site/index.mjs b/.github/site/index.mjs
new file mode 100644
index 0000000..53e8b8e
--- /dev/null
+++ b/.github/site/index.mjs
@@ -0,0 +1,49 @@
+import mermaid from "https://cdn.jsdelivr.net/npm/mermaid@11.12.0/+esm";
+import "https://cdn.jsdelivr.net/npm/docsify@4.13.1/+esm";
+
+mermaid.initialize({ startOnLoad: false });
+
+// see https://docsify.js.org/#/configuration
+
+window.$docsify = {
+  name: 'Ghostbird \u{1faba}\u{1f4eb}\u{1f47b}',
+  repo: 'exteditor/ghostbird',
+  logo: 'ext/blue.svg',
+  relativePath: true,
+  executeScript: true,
+  homepage: "homepage.md",
+  coverpage: "coverpage.md",
+  auto2top: true,
+  maxLevel: 2,
+  themeColor: '#0b9dd6',
+  routes: {
+    '/[-._/a-zA-Z]*[.][a-zA-Z]+': (route) => {
+      let url = `https://github.com/exteditor/ghostbird/blob/main/${encodeURIComponent(route.slice(1))}`
+      return `Redirecting to ${url}...\n\n<script>\nlocation.href = "${url}"${'</'}script>`
+    }
+  },
+  search: [
+    '/',
+    '/BUILDING',
+    '/CONTRIBUTING',
+    '/doc/faq',
+    '/doc/faq-architectural',
+    '/doc/building',
+    '/doc/testing',
+  ],
+  markdown: {
+    renderer: {
+      code(code, lang) {
+        if (lang === "mermaid") {
+          return `<pre class="mermaid">${code}</pre>`;
+        }
+        return this.origin.code.apply(this, arguments);
+      }
+    }
+  },
+  plugins: [
+    (hook, _vm) => {
+      hook.doneEach(() => mermaid.run());
+    },
+  ],
+};
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index df10c7a..c5ce1a5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,7 +2,7 @@ name: Build
 
 on:
   push:
-    branches-ignore: [ 'wip/*' ]
+    branches-ignore: [ 'coderabbit**', 'gh-**' ]
 
 jobs:
   build:
diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index ea354af..80682f4 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -50,10 +50,16 @@ jobs:
       - name: Configure pages
         uses: actions/configure-pages@v4
 
+      - name: Add typedoc to site
+        run: mv build/doc/ .github/site/typedoc/
+
+      - name: Add markdown files to site
+        run: mv *.md doc/ ext/ .github/site/
+
       - name: Upload pages artifact
         uses: actions/upload-pages-artifact@v4
         with:
-          path: build/doc
+          path: .github/site/
 
       - name: Deploy pages
         uses: actions/deploy-pages@v4
diff --git a/README.md b/README.md
index 53274af..d4dc4fb 100644
--- a/README.md
+++ b/README.md
@@ -62,9 +62,9 @@ Alternatively, you can:
 
 1. Launch your favorite text editor.
 2. Start the GhostText server in your text editor (e.g., with `:GhostTextStart` in Vim).
-3. Press the gray Ghostbird button <img src="./ext/gray.svg" width="24" height="24" border="1"> in the Thunderbird mail compose window. (The default shortcut is <kbd>^Ctrl</kbd>+<kbd>⇧Shift</kbd>+<kbd>H</kbd>)
-   * If the connection is successful, the button will turn blue <img src="./ext/blue.svg" width="24" height="24" border="1">.
-   * If the connection fails, the button will turn red <img src="./ext/red.svg" width="24" height="24" border="1">. Make sure that the GhostText server is listening. See [Troubleshooting page of original GhostText](https://ghosttext.fregante.com/troubleshooting/#unable-to-connect).
+3. Press the gray Ghostbird button <img alt="Gray button" src="./ext/gray.svg" width="24" height="24" border="1"> in the Thunderbird mail compose window. (The default shortcut is <kbd>^Ctrl</kbd>+<kbd>⇧Shift</kbd>+<kbd>H</kbd>)
+   * If the connection is successful, the button will turn blue <img alt="Blue button" src="./ext/blue.svg" width="24" height="24" border="1">.
+   * If the connection fails, the button will turn red <img alt="Red button" src="./ext/red.svg" width="24" height="24" border="1">. Make sure that the GhostText server is listening. See [Troubleshooting page of original GhostText](https://ghosttext.fregante.com/troubleshooting/#unable-to-connect).
 4. Write your email in the text editor.
 5. Close your text editor to stop Ghostbird.
 
@@ -268,13 +268,13 @@ If you've looked at the options above and still want to motivate the maintainer
 
 ## License
 
-[![License: MPL-2.0](https://img.shields.io/badge/license-MPL--2.0-00d230?logo=mozilla)](./LICENSE.mpl)
-[![License: GPLv3](https://img.shields.io/badge/license-GPLv3-bd0000?logo=gplv3&logoSize=auto)](./LICENSE.gpl)<br>
+[![License: MPL-2.0](https://img.shields.io/badge/license-MPL--2.0-00d230?logo=mozilla)](https://www.mozilla.org/en-US/MPL/2.0/)
+[![License: GPLv3](https://img.shields.io/badge/license-GPLv3-bd0000?logo=gplv3&logoSize=auto)](https://www.gnu.org/licenses/gpl-3.0.html)<br>
 Ghostbird is [dual-licensed under (MPL-2.0 OR GPL-3.0-or-later)](./LICENSE). See also [NOTICE](./ext/NOTICE.md).
 
 [proj]: https://github.com/exteditor/ghostbird/projects
 [milestones]: https://github.com/exteditor/ghostbird/milestones
-[tb]: https://thunderbird.net/
+[tb]: https://www.thunderbird.net/download/esr/
 [gt]: https://ghosttext.fregante.com/
 [helix]: https://github.com/rahji/helix-ghost
 [rels]: https://github.com/exteditor/ghostbird/releases
diff --git a/src/app-background/compose_action_notifier.ts b/src/app-background/compose_action_notifier.ts
index e964f5d..14828a4 100644
--- a/src/app-background/compose_action_notifier.ts
+++ b/src/app-background/compose_action_notifier.ts
@@ -1,6 +1,7 @@
 import type { EmailEditorFactory, IComposeWindow, IGhostServerPort } from "src/ghosttext-adaptor"
 import type { GhostTextStarter } from "src/ghosttext-runner"
 
+/** Responsible for interacting with compose windows */
 export class ComposeActionNotifier {
   static isSingleton = true
   private readonly runners = new Map<number, IGhostServerPort>()
diff --git a/src/app-background/menu_handler.ts b/src/app-background/menu_handler.ts
index 1e77d8c..a740e2f 100644
--- a/src/app-background/menu_handler.ts
+++ b/src/app-background/menu_handler.ts
@@ -16,6 +16,8 @@ export class MenuHandler {
     // Compare the shown menu with menuItems and (re-)initialize the menu if necessary
     console.debug(info)
 
+    // We've tried more sophisticated logic here, but corner cases like users changing their UI language often
+    // make it fail, so we ended up with a simple check: We (re-)initialize the menu when the user first opens the menu.
     if (!this.buttonMenu.isInitialized()) {
       console.debug("Initializing menu")
       return this.buttonMenu.initItems(this.menuItems, info)
diff --git a/src/root/background.ts b/src/root/background.ts
index 81083e4..3e47198 100644
--- a/src/root/background.ts
+++ b/src/root/background.ts
@@ -4,6 +4,7 @@
  */
 
 import type { BackgroundEventRouter, MenuItem, MenuShownInfo } from "src/app-background"
+import type { Alarm } from "src/thunderbird"
 import { type LazyThen, makeLazyThen } from "src/util/lazy_then"
 
 console.info("starting", import.meta.url)
@@ -28,9 +29,16 @@ const prepareThen: LazyThen<BackgroundEventRouter> = makeLazyThen(async () => {
   ]
   let heart = new AlarmHeart(messenger)
 
+  // Set the ready flag that promises the alarm event handler is registered
+  heart.ready(onAlarm)
+
   return prepareBackgroundRouter({ messenger, heart, optionsSyncCtor, menuItems })
 })
 
+function onAlarm(alarm: Alarm): void {
+  console.debug("beep", alarm)
+}
+
 messenger.composeAction.onClicked.addListener((tab, _info): Promise<void> | void =>
   prepareThen((router) => router.handleComposeAction(tab)),
 )
@@ -51,9 +59,7 @@ messenger.runtime.onMessage.addListener((msg, sender, sendResponse): Promise<voi
   }),
 )
 
-messenger.alarms.onAlarm.addListener((alarm) => {
-  console.debug("beep", alarm)
-})
+messenger.alarms.onAlarm.addListener(onAlarm)
 
 messenger.menus.onShown.addListener((info, tab) =>
   prepareThen((router) => {
diff --git a/src/root/startup/startup_background.ts b/src/root/startup/startup_background.ts
index d56327d..32cf987 100644
--- a/src/root/startup/startup_background.ts
+++ b/src/root/startup/startup_background.ts
@@ -33,8 +33,5 @@ export const startupBackground = (consts: BackgroundConstants): WirelessInjector
 export function prepareBackgroundRouter(consts: BackgroundConstants): BackgroundEventRouter {
   let startup = startupBackground(consts)
 
-  // Set the ready flag that promises the alarm event handler is registered
-  consts.heart.assumeReady()
-
   return startup(BackgroundEventRouter)
 }
diff --git a/src/thunderbird/background_util/alarm_heart.ts b/src/thunderbird/background_util/alarm_heart.ts
index a8bb9b2..dabf2fe 100644
--- a/src/thunderbird/background_util/alarm_heart.ts
+++ b/src/thunderbird/background_util/alarm_heart.ts
@@ -1,13 +1,19 @@
 import type { IHeart } from "src/ghosttext-runner"
+import type { Alarm } from "src/thunderbird"
 
+/** Tries to prevent background script from MV3 suspension of the background script */
 export class AlarmHeart implements IHeart {
   /** Should be set if the onAlarm listener has been registered */
   private isListenerReady = false
 
   constructor(readonly messenger: typeof globalThis.messenger) {}
 
-  assumeReady(): void {
-    this.isListenerReady = true
+  /**
+   * Should be called after the onAlarm listener has been registered.
+   * Due to MV3 restriction, the event listener must be registered at the toplevel.
+   */
+  ready(registeredCallback: (alarm: Alarm) => void): void {
+    this.isListenerReady = this.messenger.alarms.onAlarm.hasListener(registeredCallback)
   }
 
   startBeat(): () => void {