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How can I change the appearance of Firefox?

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I just updated to version 40.0 & I've already noticed some things I don't like about the appearance of the new version. First, in the old version when I clicked the tools > options, it always opened in a pop-up. I really liked that. But, now, it opens in a new tab. Is there some way I can get it to open in a pop-up again? The second thing is the appearance of the "add-ons" page. I liked the way it looked in the old version, so I was wondering if there was a way to go back to the old appearance? Thanks.

I just updated to version 40.0 & I've already noticed some things I don't like about the appearance of the new version. First, in the old version when I clicked the tools > options, it always opened in a pop-up. I really liked that. But, now, it opens in a new tab. Is there some way I can get it to open in a pop-up again? The second thing is the appearance of the "add-ons" page. I liked the way it looked in the old version, so I was wondering if there was a way to go back to the old appearance? Thanks.

All Replies (1)

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For Options see this: https://support.mozilla.org/en-US/questions/1063205

As far as the Addons tab, looks like new css styling was changed to make the "inContent" appearance the same as the Options tab has been since it came about in Firefox 38. Sorry, I haven't looked into css changes for that Tab, I happen to like the new look. Maybe someone else can help you.