diff --git a/src/button/CaretForProvider.tsx b/src/button/CaretForProvider.tsx
index 09e8e73..415e4c0 100644
--- a/src/button/CaretForProvider.tsx
+++ b/src/button/CaretForProvider.tsx
@@ -49,6 +49,17 @@ const GitLabCaret = () => {
     );
 };
 
+const AzureDevOpsCaret = () => {
+    return (
+        <svg width="16" height="16" fill="none" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
+            <path
+                d="M4.22 8.47a.75.75 0 0 1 1.06 0L12 15.19l6.72-6.72a.75.75 0 1 1 1.06 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L4.22 9.53a.75.75 0 0 1 0-1.06Z"
+                fill="currentColor"
+            />
+        </svg>
+    );
+};
+
 type Props = {
     provider: SupportedApplication;
 };
@@ -61,6 +72,8 @@ export const CaretForProvider = ({ provider }: Props) => {
             return <BitbucketCaret />;
         case "gitlab":
             return <GitLabCaret />;
+        case "azure-devops":
+            return <AzureDevOpsCaret />;
         default:
             return (
                 <svg width="16" viewBox="0 0 24 24" className={classNames("chevron-icon")}>
diff --git a/src/button/button-contributions.ts b/src/button/button-contributions.ts
index d440366..0cfc08c 100644
--- a/src/button/button-contributions.ts
+++ b/src/button/button-contributions.ts
@@ -3,7 +3,7 @@
  * Happy about anyone who's able to make this work with imports (i.e. run the tests in this project), but I couldn't figure it out and gave up.
  */
 
-export type SupportedApplication = "github" | "gitlab" | "bitbucket-server" | "bitbucket";
+export type SupportedApplication = "github" | "gitlab" | "bitbucket-server" | "bitbucket" | "azure-devops";
 
 const resolveMetaAppName = (head: HTMLHeadElement): string | undefined => {
     const metaApplication = head.querySelector("meta[name=application-name]");
@@ -18,16 +18,24 @@ const resolveMetaAppName = (head: HTMLHeadElement): string | undefined => {
     return undefined;
 };
 
+export const DEFAULT_HOSTS = ["github.com", "gitlab.com", "bitbucket.org", "dev.azure.com"];
+
 /**
  * Provides a fast check to see if the current URL is on a supported site.
  */
 export const isSiteSuitable = (): boolean => {
+    const isWhitelistedHost = DEFAULT_HOSTS.some((host) => location.host === host);
+    if (isWhitelistedHost) {
+        return true;
+    }
+
     const appName = resolveMetaAppName(document.head);
     if (!appName) {
         return false;
     }
     const allowedApps = ["GitHub", "GitLab", "Bitbucket"];
-    return allowedApps.includes(appName);
+
+    return allowedApps.some((allowedApp) => appName.includes(allowedApp));
 };
 
 export interface ButtonContributionParams {
@@ -51,7 +59,7 @@ export interface ButtonContributionParams {
     /**
      * The element in which the button should be inserted.
      *
-     * This element will be inserted into teh main document and allows for styling within the original page.
+     * This element will be inserted into the main document and allows for styling within the original page.
      *
      * The structure looks like this:
      *
@@ -98,6 +106,12 @@ export interface ButtonContributionParams {
      * the classnames to remove and add.
      */
     manipulations?: { element: string; remove?: string; add?: string; style?: Partial<CSSStyleDeclaration> }[];
+
+    /**
+     * A function that can be used to transform the URL that should be opened when the Gitpod button is clicked.
+     * @returns The transformed URL.
+     */
+    urlTransformer?: (originalURL: string) => string;
 }
 
 function createElement(
@@ -113,6 +127,61 @@ function createElement(
 }
 
 export const buttonContributions: ButtonContributionParams[] = [
+    // Azure DevOps
+    {
+        id: "ado-repo",
+        exampleUrls: [
+            // "https://dev.azure.com/services-azure/_git/project2"
+        ],
+        selector: "div.repos-files-header-commandbar:nth-child(1)",
+        containerElement: createElement("div", {}),
+        application: "azure-devops",
+        insertBefore: `div.bolt-header-command-item-button:has(button[id^="__bolt-header-command-bar-menu-button"])`,
+        manipulations: [
+            {
+                element: "div.repos-files-header-commandbar.scroll-hidden",
+                remove: "scroll-hidden",
+            },
+        ],
+        urlTransformer(originalUrl) {
+            const url = new URL(originalUrl);
+            if (url.pathname.includes("version=GB")) {
+                return originalUrl;
+            }
+            // version=GBdevelop
+            const branchElement = document.evaluate(
+                "//div[contains(@class, 'version-dropdown')]//span[contains(@class, 'text-ellipsis')]",
+                document,
+                null,
+                XPathResult.FIRST_ORDERED_NODE_TYPE,
+                null,
+            ).singleNodeValue;
+            if (branchElement) {
+                const branch = branchElement.textContent?.trim();
+                url.searchParams.set("version", `GB${branch}`);
+            }
+
+            return url.toString();
+        },
+    },
+    {
+        id: "ado-pr",
+        exampleUrls: [
+            // "https://dev.azure.com/services-azure/test-project/_git/repo2/pullrequest/1"
+        ],
+        selector: ".repos-pr-header > div:nth-child(2) > div:nth-child(1)",
+        containerElement: createElement("div", {}),
+        application: "azure-devops",
+        insertBefore: `div.bolt-header-command-item-button:has(button[id^="__bolt-menu-button-"])`,
+    },
+    {
+        id: "ado-repo-empty",
+        exampleUrls: [],
+        selector: "div.clone-with-application",
+        application: "azure-devops",
+        containerElement: createElement("div", { marginLeft: "4px", marginRight: "4px" }),
+    },
+
     // GitLab
     {
         id: "gl-repo", // also taking care of branches
diff --git a/src/button/button.css b/src/button/button.css
index 31faf27..a8bb6fc 100644
--- a/src/button/button.css
+++ b/src/button/button.css
@@ -315,3 +315,26 @@
         0 0 1px rgba(9, 30, 66, 0.31)
     );
 }
+
+.azure-devops {
+    --font-family: "Segoe UI", "-apple-system", BlinkMacSystemFont, Roboto, "Helvetica Neue", Helvetica, Ubuntu, Arial,
+        sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
+    --primary-bg-color: var(--communication-background, rgba(0, 120, 212, 1));
+    --primary-hover-bg-color: rgba(var(--palette-primary-darkened-6, 0, 103, 181), 1);
+    --primary-color: var(--text-on-communication-background, rgba(255, 255, 255, 1));
+    --primary-hover-color: var(--text-on-communication-background, rgba(255, 255, 255, 1));
+    --primary-separator-color: rgba(var(--palette-primary-darkened-10, 0, 91, 161), 1);
+    --font-weight: 600;
+    --primary-height: 32px;
+
+    --dropdown-color: var(--text-primary-color, rgba(0, 0, 0, 0.9));
+    --dropdown-bg-color: var(--callout-background-color, rgba(255, 255, 255, 1));
+    --dropdown-hover-bg-color: var(--palette-black-alpha-4, rgba(0, 0, 0, 0.04));
+    --dropdown-box-shadow: 0 3.2px 7.2px 0 var(--callout-shadow-color, rgba(0, 0, 0, 0.132)),
+        0 0.6px 1.8px 0 var(--callout-shadow-secondary-color, rgba(0, 0, 0, 0.108));
+    --dropdown-border-width: 0;
+    --dropdown-border-radius: 4px;
+
+    --border-radius: 2px;
+    --border-width: 0px;
+}
diff --git a/src/button/button.tsx b/src/button/button.tsx
index d5b0ea9..2c28108 100644
--- a/src/button/button.tsx
+++ b/src/button/button.tsx
@@ -9,13 +9,14 @@ import { DEFAULT_GITPOD_ENDPOINT, EVENT_CURRENT_URL_CHANGED } from "~constants";
 import { STORAGE_KEY_ADDRESS, STORAGE_KEY_ALWAYS_OPTIONS, STORAGE_KEY_NEW_TAB } from "~storage";
 
 import type { SupportedApplication } from "./button-contributions";
-import { BitbucketCaret, CaretForProvider, GitHubCaret } from "./CaretForProvider";
+import { CaretForProvider } from "./CaretForProvider";
 
 type Props = {
     application: SupportedApplication;
     additionalClassNames?: string[];
+    urlTransformer?: (url: string) => string;
 };
-export const GitpodButton = ({ application, additionalClassNames }: Props) => {
+export const GitpodButton = ({ application, additionalClassNames, urlTransformer }: Props) => {
     const [address] = useStorage<string>(STORAGE_KEY_ADDRESS, DEFAULT_GITPOD_ENDPOINT);
     const [openInNewTab] = useStorage<boolean>(STORAGE_KEY_NEW_TAB, true);
     const [disableAutostart] = useStorage<boolean>(STORAGE_KEY_ALWAYS_OPTIONS, false);
@@ -36,19 +37,19 @@ export const GitpodButton = ({ application, additionalClassNames }: Props) => {
         };
     }, []);
 
-    const actions = useMemo(
-        () => [
+    const actions = useMemo(() => {
+        const parsedHref = !urlTransformer ? currentHref : urlTransformer(currentHref);
+        return [
             {
-                href: `${address}/?autostart=${!disableAutostart}#${currentHref}`,
+                href: `${address}/?autostart=${!disableAutostart}#${parsedHref}`,
                 label: "Open",
             },
             {
-                href: `${address}/?autostart=false#${currentHref}`,
+                href: `${address}/?autostart=false#${parsedHref}`,
                 label: "Open with options...",
             },
-        ],
-        [address, disableAutostart, currentHref],
-    );
+        ];
+    }, [address, disableAutostart, currentHref, urlTransformer]);
     const dropdownRef = useRef<HTMLDivElement | null>(null);
     const firstActionRef = useRef<HTMLAnchorElement | null>(null);
 
diff --git a/src/contents/button.tsx b/src/contents/button.tsx
index 4d698cc..f7cade0 100644
--- a/src/contents/button.tsx
+++ b/src/contents/button.tsx
@@ -7,8 +7,9 @@ import { EVENT_CURRENT_URL_CHANGED } from "~constants";
 import { GitpodButton } from "../button/button";
 import { buttonContributions, isSiteSuitable, type ButtonContributionParams } from "../button/button-contributions";
 
+// keep in sync with DEFAULT_HOSTS in src/button/button-contributions.ts
 export const config: PlasmoCSConfig = {
-    matches: ["https://github.com/*", "https://gitlab.com/*", "https://bitbucket.org/*"],
+    matches: ["https://github.com/*", "https://gitlab.com/*", "https://bitbucket.org/*", "https://dev.azure.com/*"],
 };
 
 export const getStyle = () => {
@@ -45,6 +46,7 @@ class ButtonContributionManager {
                         key={containerId}
                         application={contribution.application}
                         additionalClassNames={contribution.additionalClassNames}
+                        urlTransformer={contribution.urlTransformer}
                     />,
                 );
             }
diff --git a/test/src/button-contributions-copy.ts b/test/src/button-contributions-copy.ts
index 04c91b3..f3db6b1 100644
--- a/test/src/button-contributions-copy.ts
+++ b/test/src/button-contributions-copy.ts
@@ -3,7 +3,7 @@
  * Happy about anyone who's able to make this work with imports (i.e. run the tests in this project), but I couldn't figure it out and gave up.
  */
 
-export type SupportedApplication = "github" | "gitlab" | "bitbucket-server" | "bitbucket";
+export type SupportedApplication = "github" | "gitlab" | "bitbucket-server" | "bitbucket" | "azure-devops";
 
 const resolveMetaAppName = (head: HTMLHeadElement): string | undefined => {
     const metaApplication = head.querySelector("meta[name=application-name]");
@@ -18,16 +18,24 @@ const resolveMetaAppName = (head: HTMLHeadElement): string | undefined => {
     return undefined;
 };
 
+export const DEFAULT_HOSTS = ["github.com", "gitlab.com", "bitbucket.org", "dev.azure.com"];
+
 /**
  * Provides a fast check to see if the current URL is on a supported site.
  */
 export const isSiteSuitable = (): boolean => {
+    const isWhitelistedHost = DEFAULT_HOSTS.some((host) => location.host === host);
+    if (isWhitelistedHost) {
+        return true;
+    }
+
     const appName = resolveMetaAppName(document.head);
     if (!appName) {
         return false;
     }
     const allowedApps = ["GitHub", "GitLab", "Bitbucket"];
-    return allowedApps.includes(appName);
+
+    return allowedApps.some((allowedApp) => appName.includes(allowedApp));
 };
 
 export interface ButtonContributionParams {
@@ -51,7 +59,7 @@ export interface ButtonContributionParams {
     /**
      * The element in which the button should be inserted.
      *
-     * This element will be inserted into teh main document and allows for styling within the original page.
+     * This element will be inserted into the main document and allows for styling within the original page.
      *
      * The structure looks like this:
      *
@@ -98,6 +106,12 @@ export interface ButtonContributionParams {
      * the classnames to remove and add.
      */
     manipulations?: { element: string; remove?: string; add?: string; style?: Partial<CSSStyleDeclaration> }[];
+
+    /**
+     * A function that can be used to transform the URL that should be opened when the Gitpod button is clicked.
+     * @returns The transformed URL.
+     */
+    urlTransformer?: (originalURL: string) => string;
 }
 
 function createElement(
@@ -113,6 +127,61 @@ function createElement(
 }
 
 export const buttonContributions: ButtonContributionParams[] = [
+    // Azure DevOps
+    {
+        id: "ado-repo",
+        exampleUrls: [
+            // "https://dev.azure.com/services-azure/_git/project2"
+        ],
+        selector: "div.repos-files-header-commandbar:nth-child(1)",
+        containerElement: createElement("div", {}),
+        application: "azure-devops",
+        insertBefore: `div.bolt-header-command-item-button:has(button[id^="__bolt-header-command-bar-menu-button"])`,
+        manipulations: [
+            {
+                element: "div.repos-files-header-commandbar.scroll-hidden",
+                remove: "scroll-hidden",
+            },
+        ],
+        urlTransformer(originalUrl) {
+            const url = new URL(originalUrl);
+            if (url.pathname.includes("version=GB")) {
+                return originalUrl;
+            }
+            // version=GBdevelop
+            const branchElement = document.evaluate(
+                "//div[contains(@class, 'version-dropdown')]//span[contains(@class, 'text-ellipsis')]",
+                document,
+                null,
+                XPathResult.FIRST_ORDERED_NODE_TYPE,
+                null,
+            ).singleNodeValue;
+            if (branchElement) {
+                const branch = branchElement.textContent?.trim();
+                url.searchParams.set("version", `GB${branch}`);
+            }
+
+            return url.toString();
+        },
+    },
+    {
+        id: "ado-pr",
+        exampleUrls: [
+            // "https://dev.azure.com/services-azure/test-project/_git/repo2/pullrequest/1"
+        ],
+        selector: ".repos-pr-header > div:nth-child(2) > div:nth-child(1)",
+        containerElement: createElement("div", {}),
+        application: "azure-devops",
+        insertBefore: `div.bolt-header-command-item-button:has(button[id^="__bolt-menu-button-"])`,
+    },
+    {
+        id: "ado-repo-empty",
+        exampleUrls: [],
+        selector: "div.clone-with-application",
+        application: "azure-devops",
+        containerElement: createElement("div", { marginLeft: "4px", marginRight: "4px" }),
+    },
+
     // GitLab
     {
         id: "gl-repo", // also taking care of branches