A Big Problem in Firefox (40.0.2 - latest) running under Windows 10

[kg11sgbg]

Guys,please Help me out from the nagging problem cropping up,whenever I try to open up some sites(not all).

This message is shown :-->

XML Parsing Error: undefined entity Location: jar:jar:file:///C:/Users/****%20****/AppData/Roaming/Mozilla/Firefox/Profiles/8cc1ldcz.default/extensions/speedtest@gotomyhelp.com.xpi!/chrome/speedtest.jar!/content/netError.xhtml Line Number 369, Column 38:
<h1 id="et_protocolNotFound">&protocolNotFound.title;</h1>

I have to click on the "Reload current page" icon 3~4 times to enter into the site.

What is the problem???

 

[ariftwister]

It seems an issue with Speedtest Extension. Did you try disabling it ??

 

[kg11sgbg]

It seems an issue with Speedtest Extension. Did you try disabling it ??

Thanks for the advice.
Yes it is gone now,after disabling the speedtest extension. Just overlooked the message.
Thank You Friend once again.
Problem resolved.