Clicking on a link in a Google search result not working

[Ztruker]

If I do a Google search then left click on a result, nothing happens. Right click and Open in new tab or Open in new window works okay.

In Seamoinkey Safe-mode it works correctly.
I disabled all my add-ons, no help.
Removed user.js, no help.
Removed prefs.js so a new, default prefs,js was created and it works correctly so something I did in prefs.js is causing this but I can't figure out what. The only thing I've been doing is in about:config, trying different UA strings to see if some websites are having sniffing problems.

I have added several site specific UA overrides for some sites like:

general.useragent.override.att.com;Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
general.useragent.override.att.net;Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
general.useragent.override.ebay.com;Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
general.useragent.override.google.com;Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko

I can't think of any other settings I've changed in there around the time this started happening (2 weeks or so).

[Frank Lion]

I have added several site specific UA overrides for some sites like:

general.useragent.override.google.com;Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko[/b]

The long answer is long and a bit complicated.

So, short answer - for Google try using a Firefox UA string. There are sites online that can give you lists of UA strings, so just find a, say, Firefox 60 one amongst them.

As a general rule (which I've broken at times) try to use Firefox UA with overrides, instead of IE's Trident. Webpages are often/mostly coded slightly differently for different browsers and glitches can occur sometimes if you stray too far away from your real browser UA.

[Ztruker]

Thanks Frank. Changed it to Firefox 66.0 and it works. Thinking back, it was around the time I added the UA string for Google that this started.

[Ztruker]

Hmmm, US string at the bottom of my post looks wrong. Trying again.