What's your favorite under-documented command/feature in Firefox?

[TDH]

For me it's definitely Ctrl + Shift + T. It recalls the last tab that you just closed. I first learned about it a few months ago and have been using it extensively since then.

[SaintsBrazil]

ooohhhh thanks. that's nice to know.

[Eeyore]

That's especially helpful thanks!

I'm really liking the fact that Firefox underlines misspelled words in red.

[Severum]

Perhaps not under-documented so much as under-utilized, but I'll submit smart keywords/quick searches. Around 25 one or two letter keywords handle 95% of my search duties.

[HouDat]

CTRL + SHIFT + DEL is a shortcut to clear out your pre-set list of sensitive browsing data (cookies, browsing history, and/or cache, for example). Nice feature if you ever wind up having to share a computer.

And the "dict + XXXX" (where "XXXX" is a word for which you seek a definition) feature is $$$$.

[SaintsBrazil]

And the "dict + XXXX" (where "XXXX" is a word for which you seek a definition) feature is $$$$.

How does that one work, do you type this in the address bar?

[Severum]

Yep, just type it in the address bar. You can also add other sites/keywords by going to a site, right clicking in the site's search box, and select 'add a keyword for this search'. Type whatever you entered as the keyword plus your search string in the address bar to search without going to the site.

[superchuck500]

Originally Posted by SaintsBrazil

How does that one work, do you type this in the address bar?

also, with google you can type "define: XXXX" and the search is for definition entries.

kind of useful as well.

[Beast]

Originally Posted by HouDat

CTRL + SHIFT + DEL is a shortcut to clear out your pre-set list of sensitive browsing data (cookies, browsing history, and/or cache, for example). Nice feature if you ever wind up having to share a computer.

+1

Add the Stealther and History Manager add-ons to that also..