diff --git a/cli/src/commands/dev/dev.ts b/cli/src/commands/dev/dev.ts
index 7fa588f971..0ee46410f2 100644
--- a/cli/src/commands/dev/dev.ts
+++ b/cli/src/commands/dev/dev.ts
@@ -108,6 +108,7 @@ function restorePathScripts(flowValue: any) {
 export interface DevOpts {
   proxyPort?: number;
   path?: string;
+  noBrowser?: boolean;
 }
 
 export async function dev(opts: GlobalOptions & SyncOptions & DevOpts) {
@@ -146,7 +147,6 @@ export async function dev(opts: GlobalOptions & SyncOptions & DevOpts) {
         } else {
           opts.path = relPath;
         }
-        opts.proxyPort = opts.proxyPort ?? 3100;
         log.info(`Detected flow folder, path: ${opts.path}`);
         process.chdir(workspaceRoot);
       }
@@ -515,6 +515,22 @@ export async function dev(opts: GlobalOptions & SyncOptions & DevOpts) {
     });
   }
 
+  function maybeOpenBrowser(url: string) {
+    if (opts.noBrowser) return;
+    try {
+      open.default(url).catch((error) => {
+        console.error(
+          `Failed to open browser, please navigate to ${url}, error: ${error}`
+        );
+      });
+      console.log(`Opened browser at ${url}`);
+    } catch (error) {
+      console.error(
+        `Failed to open browser, please navigate to ${url}, ${error}`
+      );
+    }
+  }
+
   // --- Reverse proxy (when --proxy-port is set) ---
 
   async function startProxyServer(proxyPort: number) {
@@ -629,6 +645,7 @@ export async function dev(opts: GlobalOptions & SyncOptions & DevOpts) {
     return new Promise<void>((resolve) => {
       proxyServer.listen(proxyPort, () => {
         console.log(`Dev proxy listening on http://localhost:${proxyPort}`);
+        maybeOpenBrowser(`http://localhost:${proxyPort}/`);
         resolve();
       });
     });
@@ -651,18 +668,7 @@ export async function dev(opts: GlobalOptions & SyncOptions & DevOpts) {
       (opts.path ? `&path=${opts.path}` : "");
 
     console.log(`Go to ${url}`);
-    try {
-      open.default(url).catch((error) => {
-        console.error(
-          `Failed to open browser, please navigate to ${url}, error: ${error}`
-        );
-      });
-      console.log("Opened browser for you");
-    } catch (error) {
-      console.error(
-        `Failed to open browser, please navigate to ${url}, ${error}`
-      );
-    }
+    maybeOpenBrowser(url);
 
     console.log(
       "Dev server will automatically point to the last script edited locally"
@@ -702,6 +708,10 @@ const command = new Command()
     "--path <path:string>",
     "Watch a specific windmill path (e.g., u/admin/my_script or f/my_flow)"
   )
+  .option(
+    "--no-browser",
+    "Do not open the browser automatically"
+  )
   .action(dev as any);
 
 export default command;
diff --git a/cli/src/commands/flow/flow.ts b/cli/src/commands/flow/flow.ts
index 46bc7a2041..3b320d5987 100644
--- a/cli/src/commands/flow/flow.ts
+++ b/cli/src/commands/flow/flow.ts
@@ -744,7 +744,7 @@ export async function bootstrap(
     configurations: [{
       name: "windmill",
       runtimeExecutable: "bash",
-      runtimeArgs: ["-c", "wmill dev --proxy-port ${PORT:-4000}"],
+      runtimeArgs: ["-c", "wmill dev --proxy-port ${PORT:-4000} --no-browser"],
       port: 4000,
       autoPort: true,
     }],
diff --git a/cli/src/commands/init/init.ts b/cli/src/commands/init/init.ts
index b10d5e36eb..3647604d29 100644
--- a/cli/src/commands/init/init.ts
+++ b/cli/src/commands/init/init.ts
@@ -282,7 +282,7 @@ async function initAction(opts: InitOptions) {
       configurations: [{
         name: "windmill",
         runtimeExecutable: "bash",
-        runtimeArgs: ["-c", "wmill dev --proxy-port ${PORT:-4000}"],
+        runtimeArgs: ["-c", "wmill dev --proxy-port ${PORT:-4000} --no-browser"],
         port: 4000,
         autoPort: true,
       }],
diff --git a/cli/src/guidance/skills.ts b/cli/src/guidance/skills.ts
index d955db93eb..67f1f20438 100644
--- a/cli/src/guidance/skills.ts
+++ b/cli/src/guidance/skills.ts
@@ -5335,6 +5335,7 @@ Launch a dev server that watches for local file changes and auto-pushes them to
 - \`--includes <pattern...:string>\` - Filter paths givena glob pattern or path
 - \`--proxy-port <port:number>\` - Port for a localhost reverse proxy to the remote Windmill server
 - \`--path <path:string>\` - Watch a specific windmill path (e.g., u/admin/my_script or f/my_flow)
+- \`--no-browser\` - Do not open the browser automatically
 
 ### docs
 
diff --git a/system_prompts/auto-generated/cli/cli-commands.md b/system_prompts/auto-generated/cli/cli-commands.md
index cb2bf51fea..15a5ca7a92 100644
--- a/system_prompts/auto-generated/cli/cli-commands.md
+++ b/system_prompts/auto-generated/cli/cli-commands.md
@@ -77,6 +77,7 @@ Launch a dev server that watches for local file changes and auto-pushes them to
 - `--includes <pattern...:string>` - Filter paths givena glob pattern or path
 - `--proxy-port <port:number>` - Port for a localhost reverse proxy to the remote Windmill server
 - `--path <path:string>` - Watch a specific windmill path (e.g., u/admin/my_script or f/my_flow)
+- `--no-browser` - Do not open the browser automatically
 
 ### docs
 
diff --git a/system_prompts/auto-generated/prompts.ts b/system_prompts/auto-generated/prompts.ts
index b2f062d0d7..3765557abd 100644
--- a/system_prompts/auto-generated/prompts.ts
+++ b/system_prompts/auto-generated/prompts.ts
@@ -1836,6 +1836,7 @@ Launch a dev server that watches for local file changes and auto-pushes them to
 - \`--includes <pattern...:string>\` - Filter paths givena glob pattern or path
 - \`--proxy-port <port:number>\` - Port for a localhost reverse proxy to the remote Windmill server
 - \`--path <path:string>\` - Watch a specific windmill path (e.g., u/admin/my_script or f/my_flow)
+- \`--no-browser\` - Do not open the browser automatically
 
 ### docs
 
diff --git a/system_prompts/auto-generated/skills/cli-commands/SKILL.md b/system_prompts/auto-generated/skills/cli-commands/SKILL.md
index 1caaba8f66..16e497fa29 100644
--- a/system_prompts/auto-generated/skills/cli-commands/SKILL.md
+++ b/system_prompts/auto-generated/skills/cli-commands/SKILL.md
@@ -82,6 +82,7 @@ Launch a dev server that watches for local file changes and auto-pushes them to
 - `--includes <pattern...:string>` - Filter paths givena glob pattern or path
 - `--proxy-port <port:number>` - Port for a localhost reverse proxy to the remote Windmill server
 - `--path <path:string>` - Watch a specific windmill path (e.g., u/admin/my_script or f/my_flow)
+- `--no-browser` - Do not open the browser automatically
 
 ### docs