Browser extension to copy hyperlinks, images, and selected text as Markdown

Lookup scholarly articles as you browse the web.

Contextual unit and timezone conversion on any web page (units: several metric/Imperial, both ways, configurable; timezones: any timezone to your local time).

To pronounce a English word, do one of the following:

a free, easy-to-use Firefox extension to help you collect, manage, and cite your research sources. It lives right where you do your work — in the web browser itself.