You might not be able to move the address bar out of the main toolbar using built-in features, but possibly a style rule magician could help you.

Meanwhile, the upload didn't come through, could you attach the image to a reply? https://support.mozilla.org/questions/1199403#question-reply

And here's a useful forum for intense style rule hacking: https://www.reddit.com/r/FirefoxCSS/

sorry, did not know that i should drag the image i uploaded in order to attach it...

by the way, here is the screenshot of my customized browser (in previous version)

https://support.cdn.mozilla.net/media/uploads/images/2018-01-11-17-55-19-080f65.png

It's an advanced level of style-fu. I suggest the FirefoxCSS subreddit.

If you aren't familiar with applying custom style rules to Firefox's interface using a userChrome.css file, I created an introductory site here:

https://www.userchrome.org/

okay.,,, may be i shall take a look of FirefoxCSS subreddit... may be i find my answer there...

by the way, i have already give a visit to your site, i can move my tabs to bottom because the tutorials posted there,,, thank you...

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