Version 1.4.0

• Optional account sync — create a free account to keep your
  progress in sync across all your browsers and devices.
  No account needed to use the extension — sync is always opt-in.
• Daily notification — your 3 words of the day now appear as
  a system notification each time you open your browser, so you
  can see them without needing to browse anything.
• New popup — click the extension icon to see today's 3 words
  clearly laid out with all the English words each sound replaces.
• Every day now unlocks exactly 3 new words across all 1,000 days.
• Firefox for Android supported.
• All progress stays on your device unless you choose to sync.

This extension replaces English words with [LANGUAGE] phonetic
equivalents as the user browses. All logic runs from locally
bundled scripts. No remote code. No data collection. No network
requests. Storage is used only to save the user's vocabulary
progression locally on their device.

No build process. No minification. No webpack or code generators.
The submitted zip contains plain, human-readable JavaScript exactly
as it runs. No source code package is required as the zip itself
is the source.

Added support for Firefox for Android. The extension now works on
mobile as well as desktop — words replace themselves as you browse
on Android just as they do on your computer.