I’ve noticed that the bookmarklets for HTML and text don’t work in firefox. As I’m always tight on disc space I’ve come up with the following solution:
HTML for Firefox:
javascript:window.location='x-devonthink://createHTML?title='+encodeURIComponent(document.title)+'&location='+encodeURIComponent(window.location)+'&source='+encodeURIComponent("<html>\n"%20+%20document.documentElement.innerHTML%20+%20"</html>\n");
documentElement.innerHTML doesn’t capture the surrounding tags, so I’ve added them manually.
I’ve had less luck with text for Firefox:
javascript:window.location='x-devonthink://createText?title='+encodeURIComponent(document.title)+'&location='+encodeURIComponent(window.location)+'&source='+encodeURIComponent(document.getElementsByTagName("body")[0].textContent);
This does capture the body text but eliminates many line feeds. Any suggestions on that?
Be aware that my knowledge of DT is even less than the little I have of Javascript 
. But the HTML bookmarklet works for me.
Regards,
Alex