diff --git a/gluon.d.ts b/gluon.d.ts
index 4c48abe..a25cc12 100644
--- a/gluon.d.ts
+++ b/gluon.d.ts
@@ -161,7 +161,13 @@ type Window = {
 
 
 /** A browser that Gluon supports. */
-type Browser = 'chrome'|'chrome_canary'|'chromium'|'chromium_snapshot'|'edge'|'firefox'|'firefox_nightly';
+type Browser =
+  'chrome'|'chrome_beta'|'chrome_dev'|'chrome_canary'|
+  'chromium'|'chromium_snapshot'|
+  'edge'|'edge_beta'|'edge_dev'|'edge_canary'|
+  'firefox'|'firefox_nightly'|
+  'thorium'|
+  'librewolf';
 
 /** A browser engine that Gluon supports. */
 type BrowserEngine = 'chromium'|'firefox';
diff --git a/src/index.js b/src/index.js
index e36a4a9..90471c3 100644
--- a/src/index.js
+++ b/src/index.js
@@ -17,60 +17,82 @@ const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 
 const browserPaths = ({
-  win32: process.platform === 'win32' && {
-    chrome: [
-      join(process.env.PROGRAMFILES, 'Google', 'Chrome', 'Application', 'chrome.exe'),
-      join(process.env.LOCALAPPDATA, 'Google', 'Chrome', 'Application', 'chrome.exe')
-    ],
-    chrome_canary: [
-      join(process.env.PROGRAMFILES, 'Google', 'Chrome', 'Application', 'chrome.exe'),
-      join(process.env.LOCALAPPDATA, 'Google', 'Chrome SxS', 'Application', 'chrome.exe')
-    ],
+  win32: process.platform === 'win32' && { // windows paths are automatically prepended with program files, program files (x86), and local appdata if a string, see below
+    chrome: join('Google', 'Chrome', 'Application', 'chrome.exe'),
+    chrome_beta: join('Google', 'Chrome Beta', 'Application', 'chrome.exe'),
+    chrome_dev: join('Google', 'Chrome Dev', 'Application', 'chrome.exe'),
+    chrome_canary: join('Google', 'Chrome SxS', 'Application', 'chrome.exe'),
 
-    edge: [
-      join(process.env['PROGRAMFILES(x86)'], 'Microsoft', 'Edge', 'Application', 'msedge.exe'),
-      join(process.env.PROGRAMFILES, 'Microsoft', 'Edge', 'Application', 'msedge.exe'),
-      join(process.env.LOCALAPPDATA, 'Microsoft', 'Edge', 'Application', 'msedge.exe'),
-    ],
+    chromium: join('Chromium', 'Application', 'chrome.exe'),
 
-    chromium: [
-      join(process.env.PROGRAMFILES, 'Chromium', 'Application', 'chrome.exe'),
-      join(process.env.LOCALAPPDATA, 'Chromium', 'Application', 'chrome.exe'),
-    ],
+    edge: join('Microsoft', 'Edge', 'Application', 'msedge.exe'),
+    edge_beta: join('Microsoft', 'Edge Beta', 'Application', 'msedge.exe'),
+    edge_dev: join('Microsoft', 'Edge Dev', 'Application', 'msedge.exe'),
+    edge_canary: join('Microsoft', 'Edge SxS', 'Application', 'msedge.exe'),
 
-    firefox: [
-      join(process.env.PROGRAMFILES, 'Mozilla Firefox', 'firefox.exe'),
-      join(process.env.LOCALAPPDATA, 'Mozilla Firefox', 'firefox.exe'),
-    ],
-    firefox_nightly: [
-      join(process.env.PROGRAMFILES, 'Firefox Nightly', 'firefox.exe'),
-      join(process.env.LOCALAPPDATA, 'Firefox Nightly', 'firefox.exe'),
-    ]
+    thorium: join('Thorium', 'Application', 'thorium.exe'),
+
+    firefox: join('Mozilla Firefox', 'firefox.exe'),
+    firefox_developer: join('Firefox Developer Edition', 'firefox.exe'),
+    firefox_nightly: join('Firefox Nightly', 'firefox.exe'),
+
+    librewolf: join('LibreWolf', 'librewolf.exe'),
   },
 
   linux: { // these should be in path so just use the name of the binary
     chrome: [ 'chrome', 'google-chrome', 'chrome-browser', 'google-chrome-stable' ],
-    chrome_canary: [ 'chrome-canary', 'google-chrome-canary', 'google-chrome-unstable', 'chrome-unstable' ],
+    chrome_beta: [ 'chrome-beta', 'google-chrome-beta', 'chrome-beta-browser', 'chrome-browser-beta' ],
+    chrome_dev: [ 'chrome-unstable', 'google-chrome-unstable', 'chrome-unstable-browser', 'chrome-browser-unstable' ],
+    chrome_canary: [ 'chrome-canary', 'google-chrome-canary', 'chrome-canary-browser', 'chrome-browser-canary' ],
 
     chromium: [ 'chromium', 'chromium-browser' ],
     chromium_snapshot: [ 'chromium-snapshot', 'chromium-snapshot-bin' ],
 
-    firefox: 'firefox',
-    firefox_nightly: 'firefox-nightly'
+    edge: [ 'microsoft-edge', 'microsoft-edge-stable', 'microsoft-edge-browser' ],
+    edge_beta: [ 'microsoft-edge-beta', 'microsoft-edge-browser-beta', 'microsoft-edge-beta-browser' ],
+    edge_dev: [ 'microsoft-edge-dev', 'microsoft-edge-browser-dev', 'microsoft-edge-dev-browser' ],
+    edge_canary: [ 'microsoft-edge-canary', 'microsoft-edge-browser-canary', 'microsoft-edge-canary-browser' ],
+
+    thorium: [ 'thorium', 'thorium-browser' ],
+
+    firefox: [ 'firefox', 'firefox-browser' ],
+    firefox_nightly: [ 'firefox-nightly', 'firefox-nightly-browser', 'firefox-browser-nightly' ],
+
+    librewolf: [ 'librewolf', 'librewolf-browser' ]
   },
 
   darwin: {
     chrome: '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome',
+    chrome_beta: '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome Beta',
+    chrome_dev: '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome Dev',
     chrome_canary: '/Applications/Google Chrome Canary.app/Contents/MacOS/Google Chrome Canary',
-    edge: '/Applications/Microsoft Edge.app/Contents/MacOS/Microsoft Edge',
 
     chromium: '/Applications/Chromium.app/Contents/MacOS/Chromium',
 
+    edge: '/Applications/Microsoft Edge.app/Contents/MacOS/Microsoft Edge',
+    edge_beta: '/Applications/Microsoft Edge.app/Contents/MacOS/Microsoft Edge Beta',
+    edge_dev: '/Applications/Microsoft Edge.app/Contents/MacOS/Microsoft Edge Dev',
+    edge_canary: '/Applications/Microsoft Edge.app/Contents/MacOS/Microsoft Edge Canary',
+
     firefox: '/Applications/Firefox.app/Contents/MacOS/firefox',
     firefox_nightly: '/Applications/Firefox Nightly.app/Contents/MacOS/firefox'
   }
 })[process.platform];
 
+if (process.platform === 'win32') { // windows: automatically generate env-based paths if not arrays
+  for (const browser in browserPaths) {
+    if (!Array.isArray(browserPaths[browser])) {
+      const basePath = browserPaths[browser];
+
+      browserPaths[browser] = [
+        join(process.env.PROGRAMFILES, basePath),
+        join(process.env.LOCALAPPDATA, basePath),
+        join(process.env['PROGRAMFILES(x86)'], basePath)
+      ];
+    }
+  }
+}
+
 let _binariesInPath; // cache as to avoid excessive reads
 const getBinariesInPath = async () => {
   if (_binariesInPath) return _binariesInPath;
@@ -118,6 +140,13 @@ const findBrowserPath = async (forceBrowser) => {
 const getFriendlyName = whichBrowser => whichBrowser[0].toUpperCase() + whichBrowser.slice(1).replace(/[a-z]_[a-z]/g, _ => _[0] + ' ' + _[2].toUpperCase());
 const getDataPath = () => join(__dirname, '..', 'chrome_data');
 
+const getBrowserType = name => { // todo: not need this
+  if (name.startsWith('firefox') ||
+    [ 'librewolf' ].includes(name)) return 'firefox';
+
+  return 'chromium';
+};
+
 const startBrowser = async (url, { windowSize, forceBrowser }) => {
   const dataPath = getDataPath();
 
@@ -130,8 +159,7 @@ const startBrowser = async (url, { windowSize, forceBrowser }) => {
 
   if (!browserPath) return log('failed to find a good browser install');
 
-  const browserType = browserName.startsWith('firefox') ? 'firefox' : 'chromium';
-
+  const browserType = getBrowserType(browserName);
   const Window = await (browserType === 'firefox' ? Firefox : Chromium)({
     browserName: browserFriendlyName,
     dataPath,