Try browser testing

.travis.yml

@@ -1,3 +1,19 @@
 language: node_js
 node_js:
   - lts/*
+env:
+  global:
+    - MOZ_HEADLESS=1
+services:
+  - xvfb
+addons:
+  firefox: latest
+  chrome: stable
+cache:
+  npm: false
+
+script:
+  - npm test
+  - xvfb-run --auto-servernum npm run test-browser
+  - xvfb-run --auto-servernum npm run test-browser -- --browser chrome
+  - xvfb-run --auto-servernum npm run test-browser -- --browser firefox

package.json

@@ -13,7 +13,6 @@
     "xsalsa20": "^1.0.0"
   },
   "devDependencies": {
-    "browser-run": "^7.0.2",
     "browserify": "^16.5.1",
     "sodium-test": "^0.9.0",
     "standard": "^14.3.4",
@@ -31,10 +30,9 @@
     "crypto": "crypto"
   },
   "scripts": {
-    "browser": "browserify test.js | browser-run",
-    "browser-manual": "browserify test.js | tape-run",
     "pretest": "standard",
-    "test": "node test.js"
+    "test": "node test.js",
+    "test-browser": "browserify test.js | tape-run"
   },
   "repository": {
     "type": "git",