Since the upgrade to fireox 25 every time I open firefox has briefly see the message "Reverted change..... .in general useragent override." does this mean

Hi all, since upgrading to Firefox 25 every time I start Firefox I see briefly what follows in a small window while it is opening. "Ignore the devulcanization change... the general useragent. -What it means and if it is a problem how is it resolved? I see the same message on Windows 7 64-bit and 2 LInux distributions.
Thanks for any explanation.

COR - el, I thank you for your quick response. I deleted the User Agent Switcher Extension and restarted Firefox several times still get the message showing as in first post.
Then, I went to your link and reset the general.useragent.override remains without effect, but I noticed that there are also 2 references to the monitor of preference Extension which I disabled it then resulted in the window showing "Reverted changes... we override useragent general." is no longer appearing at the start of Firefox. It seems that the extension of this last Vers.3.4.3 was the culprit. Thank you for pointing me to finger the solution. Your help is appreciated, weg43.

Tags: Firefox

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