diff --git a/frontend/src/lib/favicon.ts b/frontend/src/lib/favicon.ts
new file mode 100644
index 0000000000..ebfd48b76d
--- /dev/null
+++ b/frontend/src/lib/favicon.ts
@@ -0,0 +1,54 @@
+import type { Job } from '$lib/gen'
+
+export type JobStatusKind = 'running' | 'success' | 'failure'
+
+const STATUS_COLORS: Record<JobStatusKind, string> = {
+	running: '#eab308',
+	success: '#22c55e',
+	failure: '#ef4444'
+}
+
+const DEFAULT_FAVICON = '/logo.svg'
+
+// Inlined windmill logo polygons (fills inlined so the SVG is self-contained as a data URI).
+const LOGO_POLYGONS =
+	'<polygon fill="#BCD4FC" points="134.78,14.22 114.31,48.21 101.33,69.75 158.22,69.75 177.97,36.95 191.67,14.22"/>' +
+	'<polygon fill="#3B82F6" points="227.55,69.75 186.61,69.75 101.33,69.75 129.78,119.02 158.16,119.02 228.61,119.02 256,119.02"/>' +
+	'<polygon fill="#3B82F6" points="136.93,132.47 116.46,167.93 73.82,241.78 130.71,241.78 144.9,217.2 180.13,156.18 193.82,132.46"/>' +
+	'<polygon fill="#3B82F6" points="121.7,131.95 101.23,96.49 58.59,22.63 30.15,71.91 44.34,96.49 79.57,157.5 93.26,181.22"/>' +
+	'<polygon fill="#BCD4FC" points="64.81,131.95 25.15,131.21 0,130.74 28.44,180.01 66.73,180.72 93.26,181.21"/>' +
+	'<polygon fill="#BCD4FC" points="165.38,181.74 184.58,216.46 196.75,238.47 225.19,189.2 206.66,155.69 193.83,132.46"/>'
+
+function faviconLink(): HTMLLinkElement {
+	let link = document.querySelector<HTMLLinkElement>('link[rel="icon"]')
+	if (!link) {
+		link = document.createElement('link')
+		link.rel = 'icon'
+		document.head.appendChild(link)
+	}
+	return link
+}
+
+/** Maps a job to one of the three favicon status colors, following the same
+ * discrimination as JobStatusIcon (`'success' in job` => completed). */
+export function getJobStatusKind(job: Job | undefined): JobStatusKind | undefined {
+	if (!job) return undefined
+	if ('success' in job) return job.success ? 'success' : 'failure'
+	if (job.canceled) return 'failure'
+	return 'running'
+}
+
+export function setStatusFavicon(status: JobStatusKind): void {
+	const color = STATUS_COLORS[status]
+	const svg =
+		'<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256">' +
+		`<g>${LOGO_POLYGONS}</g>` +
+		'<circle cx="196" cy="196" r="70" fill="#ffffff"/>' +
+		`<circle cx="196" cy="196" r="54" fill="${color}"/>` +
+		'</svg>'
+	faviconLink().href = `data:image/svg+xml,${encodeURIComponent(svg)}`
+}
+
+export function resetFavicon(): void {
+	faviconLink().href = DEFAULT_FAVICON
+}
diff --git a/frontend/src/routes/(root)/(logged)/run/[...run]/+page.svelte b/frontend/src/routes/(root)/(logged)/run/[...run]/+page.svelte
index e31d99f6b3..05b53ece63 100644
--- a/frontend/src/routes/(root)/(logged)/run/[...run]/+page.svelte
+++ b/frontend/src/routes/(root)/(logged)/run/[...run]/+page.svelte
@@ -77,7 +77,8 @@
 	import ExecutionDuration from '$lib/components/ExecutionDuration.svelte'
 	import { isWindmillTooBigObject } from '$lib/components/job_args'
 	import ScheduleEditor from '$lib/components/triggers/schedules/ScheduleEditor.svelte'
-	import { setContext, untrack } from 'svelte'
+	import { onDestroy, setContext, untrack } from 'svelte'
+	import { getJobStatusKind, resetFavicon, setStatusFavicon } from '$lib/favicon'
 
 	import FlowAssetsHandler, {
 		initFlowGraphAssetsCtx
@@ -391,6 +392,15 @@
 	$effect(() => {
 		job && untrack(() => onJobLoaded())
 	})
+	$effect(() => {
+		const status = getJobStatusKind(job)
+		if (status) {
+			setStatusFavicon(status)
+		} else {
+			resetFavicon()
+		}
+	})
+	onDestroy(resetFavicon)
 </script>
 
 <HighlightTheme />