PaneMux does not collect, transmit, sell or share any data. It makes no network requests of its own.

What it stores, all in your browser's own extension storage:

• Settings and remapped keys: in browser sync storage, so they follow your browser profile if you
  use Firefox Sync (or Chrome sync). You can turn sync off in your browser.
• Macros, marks, saved tab groups, Vimgolf rounds: on your device. Small tab groups and, if you opt
  in, your Vimgolf leaderboard are also kept in sync storage.
• Undo history (closed tabs, hidden elements, form edits): in session storage, in memory only. It's
  gone when the browser quits. Password, credit-card and one-time-code fields are never recorded.

Page content is only read to carry out a command you gave (for example, copying the paragraph you asked
to copy). None of it leaves your device except through your own clipboard.

Removing the add-on removes everything it stored.

Questions: https://github.com/PaneMux/panemux/issues