diff --git a/.gitignore b/.gitignore
index a9a0619..9db6961 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 node_modules/
 web-ext-artifacts/
 browser-polyfill.js
+*.pem
diff --git a/README.md b/README.md
index 1bbca7f..7b79ca1 100644
--- a/README.md
+++ b/README.md
@@ -11,8 +11,21 @@ cp node_modules/webextension-polyfill/dist/browser-polyfill.js .
 web-ext build -n upload_to_danbooru.zip -i README.md
 ```
 
+### Chrome
+
+```sh
+npm install --global crx3
+test -f key.pem || openssl genrsa -out key.pem 4096
+crx3 -p key.pem -o web-ext-artifacts/upload_to_danbooru.crx < web-ext-artifacts/upload_to_danbooru.zip
+```
+
 ## Install
 
 ```sh
 firefox web-ext-artifacts/upload_to_danbooru.zip
 ```
+
+### Chrome
+
+Open `chrome://extensions`, enable `Developer mode`, then drop
+`web-ext-artifacts/upload_to_danbooru.crx` onto the page.
diff --git a/background.js b/background.js
index 4735819..f589e4f 100644
--- a/background.js
+++ b/background.js
@@ -13,7 +13,7 @@ browser.contextMenus.onClicked.addListener(async function(info, tab) {
 
     const settings = await browser.storage.sync.get(['url', 'openIn']);
     const danbooruUrl = settings.url || DefaultDanbooruURL;
-    const batch = info.modifiers.some((key) => key === "Ctrl");
+    const batch = (info.modifiers || []).some((key) => key === "Ctrl");
     let url, active = true;
 
     if (batch) {
@@ -30,6 +30,7 @@ browser.contextMenus.onClicked.addListener(async function(info, tab) {
     switch (settings.openIn) {
     case "current":
         await browser.tabs.update(tab.id, {url: url.href});
+        break;
     case "background":
         active = false
     default:
diff --git a/manifest.json b/manifest.json
index fb801fd..66c4656 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,7 +2,7 @@
     "manifest_version": 2,
     "name": "Upload to Danbooru",
     "description": "Add a context menu option for images to upload to Danbooru.",
-    "version": "1.0.0",
+    "version": "1.0.1",
     "options_ui": {
         "page": "options.html",
         "browser_style": true