From 91b4d3c2c9920632103f31082594229d438b6287 Mon Sep 17 00:00:00 2001
From: Roel Nieskens <roel@pixelambacht.nl>
Date: Tue, 7 Oct 2025 10:11:00 +0200
Subject: [PATCH] Catch errors for protected pages

Like new empty tabs or the Chrome extension page. Didn't do no harm,
but this might make you worry the extension isn't working, so we
silently log a debug message
---
 src/service-worker.js | 33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/src/service-worker.js b/src/service-worker.js
index 4a9be66..abcaec9 100644
--- a/src/service-worker.js
+++ b/src/service-worker.js
@@ -70,18 +70,29 @@ async function injectStyleSheets(
 	fontDeclarations,
 	fontFileDeclarations
 ) {
-	let { extensionActive } = await chrome.storage.local.get("extensionActive");
-	let fontDeclarationsCss = fontDeclarations.join("\n");
-	let fontFileDeclarationsCss = fontFileDeclarations.join("\n");
-	if (extensionActive) {
-		// Inject CSS to activate font
-		await insertOrReplaceCss(tabId, "fonts", fontDeclarationsCss);
-		await insertOrReplaceCss(tabId, "fontfiles", fontFileDeclarationsCss);
+	try {
+		let { extensionActive } = await chrome.storage.local.get(
+			"extensionActive"
+		);
+		let fontDeclarationsCss = fontDeclarations.join("\n");
+		let fontFileDeclarationsCss = fontFileDeclarations.join("\n");
+		if (extensionActive) {
+			// Inject CSS to activate font
+			await insertOrReplaceCss(tabId, "fonts", fontDeclarationsCss);
+			await insertOrReplaceCss(
+				tabId,
+				"fontfiles",
+				fontFileDeclarationsCss
+			);
+		}
+		await chrome.scripting.executeScript({
+			target: { tabId },
+			func: extensionActive ? customFontsOn : customFontsOff
+		});
+	} catch (error) {
+		// Silently ignore errors for protected pages (chrome://, extension pages, etc.)
+		console.debug(`Can't inject into ${tabId}:`, error.message);
 	}
-	chrome.scripting.executeScript({
-		target: { tabId },
-		func: extensionActive ? customFontsOn : customFontsOff
-	});
 }
 
 async function generateFontStyleSheets() {