Drop third-party product names from export labels

What's new in 3.0:
• Side panel with every highlight on the page and a note for the page as a whole
• Keyboard shortcuts: Alt+Q to highlight, Alt+W to add a note, Alt+X for the side panel
• Custom categories: rename and recolor them, add up to 60 and give each one a quick key
• Export to Markdown, CSV or a full JSON backup, and import it on another computer
• Copy a quote with your note and a link back to the text
• Reattach notes when a page changes
• A redesigned dashboard with search, filters and undo
• Works on local HTML files
• A short guide for new users
• Polish translation

Fixed the issue where the "Create new annotation" option would be no longer available after restarting Firefox.