message: fix(options): support firefox export
  Closes
diff: @@ -199,15 +199,11 @@ export default {
  handleExport () {
  browser.runtime.getPlatformInfo()
  .then(({ os }) => {
  - let config = JSON.stringify(
  - {
  + let config = JSON.stringify({
  activeConfigID: this.activeConfigID,
  configProfileIDs: this.configProfileIDs,
  configProfiles: this.configProfiles,
  - },
  - null,
  - ' '
  - )
  + })
  if (os === 'win') {
  config = config.replace(/\r\n|\n/g, '\r\n')
  }
  @@ -215,6 +211,10 @@ export default {
  const a = document.createElement('a')
  a.href = URL.createObjectURL(file)
  a.download = `config-${Date.now()}.saladict`
  + // firefox
  + a.target = '_blank'
  + document.body.appendChild(a)
  +
  a.click()
  })
  },
  