Problems while searching for a new upstream version

package:
timeline
severity:
high
created:
2018-07-21
last updated:
2019-02-19

uscan had problems while searching for a new upstream version:
In debian/watch no matching files for watch line
  https://addons.mozilla.org/en-US/thunderbird/addon/timeline/ https://addons.mozilla.org/thunderbird/downloads/file/\d+/timeline-(\d+(?:\.\d+){1,3}(?:\w+\d+)?)-\w+\.xpi\?src=dp-btn-\w+