Fix typo

FireFox -> Firefox

Author: changeworld

articles/cloud-shell/faq-troubleshooting.md

@@ -27,7 +27,7 @@ the most common key combinations:
 
 - Windows: <kbd>Ctrl</kbd>+<kbd>c</kbd> to copy and <kbd>CTRL</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd> or
   <kbd>Shift</kbd>+<kbd>Insert</kbd> to paste.
-  - FireFox might not support clipboard permissions properly.
+  - Firefox might not support clipboard permissions properly.
 - macOS: <kbd>Cmd</kbd>+<kbd>c</kbd> to copy and <kbd>Cmd</kbd>+<kbd>v</kbd> to paste.
 - Linux: <kbd>CTRL</kbd>+<kbd>c</kbd> to copy and <kbd>CTRL</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd> to
   paste.