Safari says "Please Update Internet Explorer"

I installed Chrome, TunnelBear, Zenmate, Hotspot Shield (I uninstall the last two in a couple of minutes after installing). Can these softwares be suspicious?

Very possible that Genieo (malware) was installed inadvetently.

To make sure follow the instructions here > Remove Genieo(InstallMac) on Mac | Fix-KB

This looks like a hacked router.

From the menu bar, select

 ▹ System Preferences... ▹ Network ▹ Advanced... ▹ DNS

Under DNS Servers you should have one or more numerical addresses, such as “192.168.1.1” or “10.0.0.1”. What are those addresses?

I look it now and it's 50.28.34.201/8.8.8.8.I set it to google DNS

The first server address is bogus. If you delete the change you made, does it revert to 50.28.34.201?

But, why the same ethernet line doesn't make a problem for my friend who use only Chrome?

I don't use Chrome, but it may ignore the system DNS settings and use Google DNS.

I hope you know how that change was made in the first place. If you don't know, you may have a serious problem.

As I said, problem arises after I use a friends' ethernet connection.

Merely connecting to a network would not cause a change in the DNS settings that would persist after you disconnected from that network. If the change did persist, then it was caused by something on your computer, such as one of the VPN clients you installed.

I install BitDefender from apple store

That's useless, as is all "anti-virus" software.

50.28.34.201 is the domain name server for talentreef according to whois. It is a recruiting company. I don't know why someone would be using it unless they were an employee. Also don't know if it would accept requests from just anyone. I pinged it and it is currently online. Putting it in the first position will make it the first choice for a DNS request. If it was ignoring you, the Google DNS should have been tried, after a short delay.

However that is presumably unrelated to the fact that you were being attacked by adware. Good thing you didn't fall for it. Google search for 'outdated browser detected' and you will see lots of sites giving advice. Most for PC owners. I expect there will be some discussions on this site as well. I'll go check…

Didn't find anything like a solution for a Mac. I can't even be sure that what put that prompt up is running virus code on your Mac. People who are discussing the problem on PCs claim that it is for their machines.

I would like to believe that it is just a browser pop up and that even if you clicked to download it, the result would only be PC specific code and harmless. Nothing I read just now had any information about it on a Mac.

I checked out those software downloads you mentioned. Well, I looked at the sites making them available for download and there were reputable sites and good reviews. Unless you found a sketchy download site, they shouldn't be the cause.

I tried below :

1) Reset Safari

2) Dissable Java

3) Stop all the extension

4) check the Genieo and found nothing

5) I tried to changed the DNS to 8.8.8.8 & 8.8.4.4

~~~~ but problem still not solve.. I still got the Outdated Browser message... Any other ways that I can try? thanks

For best results you need to start a new discussion descibing what your issue is in detail and then repeat what you've tried. Otherwise only the people that might still monitoring this conversation and nobody else will see it. That's just the way this Forum works.