diff --git a/package.json b/package.json
index a5e4901..fa0e1e3 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
     "@bauke/eslint-config": "^0.1.2",
     "@bauke/prettier-config": "^0.1.2",
     "@bauke/stylelint-config": "^0.1.2",
+    "@holllo/test": "^0.2.1",
     "@types/debounce": "^1.2.1",
     "@types/node": "^20.3.1",
     "@types/platform": "^1.3.4",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1091cbd..f413e10 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1,5 +1,9 @@
 lockfileVersion: '6.0'
 
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
 dependencies:
   '@holllo/migration-helper':
     specifier: ^0.1.4
@@ -36,6 +40,9 @@ devDependencies:
   '@bauke/stylelint-config':
     specifier: ^0.1.2
     version: 0.1.2(stylelint-config-standard-scss@6.1.0)(stylelint@15.9.0)
+  '@holllo/test':
+    specifier: ^0.2.1
+    version: 0.2.1
   '@types/debounce':
     specifier: ^1.2.1
     version: 1.2.1
@@ -713,6 +720,10 @@ packages:
     resolution: {integrity: sha512-4XMYlIOSFzTDWSFizKRSYUHWEfQBNZbPI/Tc5Qhef4lhxZBCAzJt1+RutB5TpCdR6sllJN+Dt5WblCmZXCaoLw==}
     dev: false
 
+  /@holllo/test@0.2.1:
+    resolution: {integrity: sha512-QlIvEqvuEfu8vapnwai8A+1TmZGkPObgU32VEXHBc3XEKhupHZRFB778oLPYlJVuSsi4TT99890iSR3nlvVwtQ==}
+    dev: true
+
   /@holllo/webextension-storage@0.2.0(webextension-polyfill@0.10.0):
     resolution: {integrity: sha512-WiSkkY/Jg3PhlHOH8eGvRBBtvZwHrJ0FD/LF8lNZAc3uaRdonF79o/Xt9CefYUjV6FSbHl/vsccXyAoitvkRIQ==}
     peerDependencies:
diff --git a/source/background/setup.ts b/source/background/setup.ts
index 1944fd6..f9e98d9 100644
--- a/source/background/setup.ts
+++ b/source/background/setup.ts
@@ -1,4 +1,6 @@
 import browser from "webextension-polyfill";
+import {migrations} from "../storage/migrations/migrations.js";
+import {log} from "../utilities/logging.js";
 
 if ($browser === "firefox") {
   browser.browserAction.onClicked.addListener(openOptionsPage);
@@ -7,6 +9,14 @@ if ($browser === "firefox") {
 }
 
 browser.runtime.onInstalled.addListener(async () => {
+  const existingStorage = await browser.storage.sync.get();
+  if (existingStorage.version === "1.1.2") {
+    log("Running 1.1.2 to 2.0.0 data migration.", true);
+    await browser.storage.local.set({backup: JSON.stringify(existingStorage)});
+    await browser.storage.sync.clear();
+    await migrations[0].migrate(existingStorage);
+  }
+
   if ($dev) {
     await openOptionsPage();
   }
diff --git a/source/options/setup.tsx b/source/options/setup.tsx
index fbd71a0..86582a5 100644
--- a/source/options/setup.tsx
+++ b/source/options/setup.tsx
@@ -11,7 +11,11 @@ import {type Feature, Data, fromStorage} from "../storage/common.js";
 import {AppContext} from "./context.js";
 import {features} from "./features.js";
 
-window.addEventListener("load", async () => {
+window.addEventListener("DOMContentLoaded", async () => {
+  if ($test) {
+    await import("../storage/migrations/migrations.test.js");
+  }
+
   initializeGlobals();
   const manifest = browser.runtime.getManifest();
 
diff --git a/source/storage/common.ts b/source/storage/common.ts
index 2b1361e..c84fe63 100644
--- a/source/storage/common.ts
+++ b/source/storage/common.ts
@@ -1,8 +1,8 @@
-import {type Value, createValue} from "@holllo/webextension-storage";
+import {createValue} from "@holllo/webextension-storage";
 import browser from "webextension-polyfill";
 
 export enum Feature {
-  AnonymizeUsernames = "anonymize-users",
+  AnonymizeUsernames = "anonymize-usernames",
   Autocomplete = "autocomplete",
   BackToTop = "back-to-top",
   Debug = "debug",
@@ -18,6 +18,7 @@ export enum Data {
   EnabledFeatures = "enabled-features",
   KnownGroups = "known-groups",
   LatestActiveFeatureTab = "latest-active-feature-tab",
+  Version = "data-version",
 }
 
 export type HideVotesData = {
@@ -111,6 +112,13 @@ export const storageValues = {
     value: Feature.Debug,
     storage: browser.storage.sync,
   }),
+  [Data.Version]: createValue({
+    deserialize: (input) => JSON.parse(input) as string,
+    serialize: (input) => JSON.stringify(input),
+    key: Data.Version,
+    value: "2.0.0",
+    storage: browser.storage.sync,
+  }),
   [Feature.HideVotes]: createValue({
     deserialize: (input) => JSON.parse(input) as HideVotesData,
     serialize: (input) => JSON.stringify(input),
diff --git a/source/storage/migrations/migrations.test.ts b/source/storage/migrations/migrations.test.ts
new file mode 100644
index 0000000..27e7fbe
--- /dev/null
+++ b/source/storage/migrations/migrations.test.ts
@@ -0,0 +1,71 @@
+import browser from "webextension-polyfill";
+import {setup} from "@holllo/test";
+import {Data, Feature} from "../common.js";
+import {migrations} from "./migrations.js";
+import {v112Sample} from "./v1-1-2.js";
+
+await setup("Migrations", async (group) => {
+  group.test("2.0.0", async (test) => {
+    await browser.storage.sync.clear();
+
+    await migrations[0].migrate(v112Sample);
+    const storage = await browser.storage.sync.get();
+    for (const [key, value] of Object.entries(storage)) {
+      switch (key) {
+        case Data.EnabledFeatures: {
+          test.equals(
+            value,
+            '["autocomplete","back-to-top","debug","hide-votes","jump-to-new-comment","markdown-toolbar","themed-logo","user-labels"]',
+          );
+          break;
+        }
+
+        case Data.KnownGroups: {
+          test.equals(value, '["~group","~group.subgroup","~test"]');
+          break;
+        }
+
+        case Data.Version: {
+          test.equals(value, '"2.0.0"');
+          break;
+        }
+
+        case Feature.HideVotes: {
+          test.equals(
+            value,
+            '{"otherComments":true,"otherTopics":true,"ownComments":true,"ownTopics":false}',
+          );
+          break;
+        }
+
+        case Feature.UsernameColors: {
+          test.equals(
+            value,
+            '[{"color":"red","id":4,"username":"Test"},{"color":"green","id":18,"username":"AnotherTest"}]',
+          );
+          break;
+        }
+
+        case `${Feature.UserLabels}-1`: {
+          test.equals(
+            value,
+            '{"color":"#ff00ff","id":1,"priority":0,"text":"Test Label","username":"Test"}',
+          );
+          break;
+        }
+
+        case `${Feature.UserLabels}-15`: {
+          test.equals(
+            value,
+            '{"id":15,"color":"var(--syntax-string-color)","priority":0,"text":"Another Label","username":"AnotherTest"}',
+          );
+          break;
+        }
+
+        default: {
+          console.log(key, JSON.stringify(value));
+        }
+      }
+    }
+  });
+});
diff --git a/source/storage/migrations/migrations.ts b/source/storage/migrations/migrations.ts
new file mode 100644
index 0000000..f312ad7
--- /dev/null
+++ b/source/storage/migrations/migrations.ts
@@ -0,0 +1,52 @@
+import {setup} from "@holllo/test";
+import {type Migration} from "@holllo/migration-helper";
+import browser from "webextension-polyfill";
+import {Data, Feature, fromStorage, saveUserLabels} from "../common.js";
+import {v112DeserializeData, v112Sample, type V112Settings} from "./v1-1-2.js";
+
+export const migrations: Array<Migration<string>> = [
+  {
+    version: "2.0.0",
+    async migrate(data: V112Settings): Promise<void> {
+      const deserialized = v112DeserializeData(data);
+      data.data.userLabels = deserialized.userLabels;
+      data.data.usernameColors = deserialized.usernameColors;
+      await saveUserLabels(data.data.userLabels);
+
+      const hideVotes = await fromStorage(Feature.HideVotes);
+      hideVotes.value = {
+        otherComments: data.data.hideVotes.comments,
+        otherTopics: data.data.hideVotes.topics,
+        ownComments: data.data.hideVotes.ownComments,
+        ownTopics: data.data.hideVotes.ownTopics,
+      };
+      await hideVotes.save();
+
+      const knownGroups = await fromStorage(Data.KnownGroups);
+      knownGroups.value = new Set(data.data.knownGroups);
+      await knownGroups.save();
+
+      const version = await fromStorage(Data.Version);
+      version.value = "2.0.0";
+      await version.save();
+
+      const usernameColors = await fromStorage(Feature.UsernameColors);
+      usernameColors.value = data.data.usernameColors;
+      await usernameColors.save();
+
+      const enabledFeatures = await fromStorage(Data.EnabledFeatures);
+      for (const [key, value] of Object.entries(data.features)) {
+        if (value) {
+          const snakeCasedKey = key.replace(/([A-Z])/g, "-$1").toLowerCase();
+          if (Object.values(Feature).includes(snakeCasedKey as Feature)) {
+            enabledFeatures.value.add(snakeCasedKey as Feature);
+          } else {
+            throw new Error(`Unknown key: ${key}`);
+          }
+        }
+      }
+
+      await enabledFeatures.save();
+    },
+  },
+];
diff --git a/source/storage/migrations/v1-1-2.ts b/source/storage/migrations/v1-1-2.ts
new file mode 100644
index 0000000..5ad04cb
--- /dev/null
+++ b/source/storage/migrations/v1-1-2.ts
@@ -0,0 +1,114 @@
+export function v112DeserializeData(data: Record<string, any>): {
+  userLabels: V112Settings["data"]["userLabels"];
+  usernameColors: V112Settings["data"]["usernameColors"];
+} {
+  const deserialized: ReturnType<typeof v112DeserializeData> = {
+    userLabels: [],
+    usernameColors: [],
+  };
+
+  for (const [key, value] of Object.entries(data)) {
+    if (key.startsWith("userLabel")) {
+      deserialized.userLabels.push(
+        value as (typeof deserialized)["userLabels"][number],
+      );
+    } else if (key.startsWith("usernameColor")) {
+      deserialized.usernameColors.push(
+        value as (typeof deserialized)["usernameColors"][number],
+      );
+    }
+  }
+
+  return deserialized;
+}
+
+export type V112Settings = {
+  [index: string]: any;
+  data: {
+    hideVotes: {
+      comments: boolean;
+      topics: boolean;
+      ownComments: boolean;
+      ownTopics: boolean;
+    };
+    knownGroups: string[];
+    latestActiveFeatureTab: string;
+    userLabels: Array<{
+      color: string;
+      id: number;
+      priority: number;
+      text: string;
+      username: string;
+    }>;
+    usernameColors: Array<{
+      color: string;
+      id: number;
+      username: string;
+    }>;
+  };
+  features: {
+    anonymizeUsernames: boolean;
+    autocomplete: boolean;
+    backToTop: boolean;
+    debug: boolean;
+    hideVotes: boolean;
+    jumpToNewComment: boolean;
+    markdownToolbar: boolean;
+    themedLogo: boolean;
+    userLabels: boolean;
+    usernameColors: boolean;
+  };
+  version: string;
+};
+
+export const v112Sample: V112Settings = {
+  data: {
+    hideVotes: {
+      comments: true,
+      ownComments: true,
+      ownTopics: false,
+      topics: true,
+    },
+    knownGroups: ["~group", "~group.subgroup", "~test"],
+    latestActiveFeatureTab: "userLabels",
+    userLabels: [],
+    usernameColors: [],
+  },
+  features: {
+    anonymizeUsernames: false,
+    autocomplete: true,
+    backToTop: true,
+    debug: true,
+    hideVotes: true,
+    jumpToNewComment: true,
+    markdownToolbar: true,
+    themedLogo: true,
+    userLabels: true,
+    usernameColors: false,
+  },
+  version: "1.1.2",
+  userLabel1: {
+    color: "#ff00ff",
+    id: 1,
+    priority: 0,
+    text: "Test Label",
+    username: "Test",
+  },
+  userLabel15: {
+    id: 15,
+    color: "var(--syntax-string-color)",
+    priority: 0,
+    text: "Another Label",
+    username: "AnotherTest",
+  },
+  usernameColor4: {
+    color: "red",
+    id: 4,
+    username: "Test",
+  },
+  usernameColor18: {
+    color: "green",
+    id: 18,
+    username: "AnotherTest",
+  },
+};