This is the best web highligher addon on Firefox browser at the moment. A similar one that works on Chrome is web highlights, but the developer doesn't seem to have any plans to extend it to firefox, which means that this addon has no competition on firefox. Hopefully the author will do the English language work so that more international users can use this addon. Maybe you can give this addon an English name and make a introduction video on Youtube. I am sure with the current pricing it can attract a lot of international users to pay for the subscription.

能标注图片，还支持导出到各笔记软件。目前碰到的最好的标注扩展

找了好久终于找到了一个好用的网页标记插件，用起来很顺手