Changed

• Major simplification: Removed popup UI, keyboard shortcuts, and options page
• Streamlined permissions: Reduced to minimal required permissions (activeTab, clipboardWrite, contextMenus)
• Simplified architecture: Extension now works with just icon click and right-click menu
• Fixed clipboard issues: Replaced deprecated document.execCommand with modern Clipboard API

Removed

• Popup interface and related functionality
• Keyboard shortcut (Alt+M)
• Options page and YouTube format settings
• Storage and scripting permissions
• Click behavior configuration

Added
Updated documentation and options page to reflect cross-browser support
MarkLink can now be installed permanently in Firefox via the .xpi from GitHub releases or from the Firefox Add-ons Store (link)

Changed
Keyboard shortcut instructions now include both Chrome and Firefox
README and UI text updated to clarify multi-browser compatibility