Lifehacker reader Samar liked the quick-write convenience of the GmailThis bookmarklet, but wanted to dig deeper to find a solution that would both work with his (and our own) favorite Windows keyword launcher, Launchy, and run whether or not Firefox (or any default Windows browser) was already open. We’re glad he did, because he’s come up with a one-line command that lets you open new Gmail composition windows from anywhere. The tip, and screenshots, after the jump.

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