message: fix: download exported wordpage files on Firefox
diff: @@ -98,8 +98,13 @@ export class ExportModalBody extends React.Component<ExportModalInnerProps, Expo
  : this.state.processedWords
  const file = new Blob([content], { type: 'text/plain;charset=utf-8' })
  const a = document.createElement('a')
  + a.style.display = 'none'
  a.href = URL.createObjectURL(file)
  - a.download = `saladict-${Date.now()}`
  + a.download = `saladict-words-${Date.now()}.txt`
  + // firefox
  + a.target = '_blank'
  + document.body.appendChild(a)
  +
  a.click()
  })
  }
  