static prefixes() {
    if (this.prefixesCache) {
      return this.prefixesCache
    }

    this.prefixesCache = []
    for (let name in agents) {
      this.prefixesCache.push(`-${agents[name].prefix}-`)
    }

    this.prefixesCache = utils
      .uniq(this.prefixesCache)
      .sort((a, b) => b.length - a.length)

    return this.prefixesCache
  }
Return all prefixes for default browser data