If you are concerned about security:

(1) Avoid installing malware. The most common source of this kind of infection is a bundle with some freeware/shareware you wanted.

(2) Do not run obsolete versions of Firefox. Mozilla discloses security flaws after each new release.

For steps to clean that particular infection, search:

https://www.google.com/search?q=remove+trotux

I suggest comparing several sites, and avoiding the use of tools that expect a registration or require an email address before use.

You need to update your Firefox, You apear to be on an ancient Fx18 it is now Fx47, You also need to update Flashplayer.

Take care NOT to use fake updates off the internet. Please follow these instructions

• See Update Firefox to the latest release
  Use: Menu Button {Three bar icon) -> Help {(?) icon) -> About Firefox
• Flash Plugin - Keep it up to date and troubleshoot problems
  Visit adobe.com/software/flash/about/ but be aware of offers of other downloads you may not want besides the update

In my opinion, the most important thing you should do is to remove Trotux malware from your computer. This can prevent it from attacking other non-affected browsers installed on your machine. Sometimes, even though you have the best browser in the world, malware still can attack it. So, removing the malware is a wise choice. This article article talks about Trotux.com and provide instructions to help you remove this malware from your PC completely.

Brenda I agree you are correct in saying the malware needs removing, and thanks for posting.

However I will edit your link to make it none clickable. Anyone wishing to use it may still copy and paste it in to the addressbar and replace the letters DOT with a dot or period/full-stop character.

That article you link to is probably not the best type of advice for the following reasons.

1. It strongly and repeatedly pushes spywarehunter. Personally I do not think that is the best site or software for malware issues. I know some reputable sites do not recommend that software and I am sure share that opinion.
2. As a manual method it includes using Regedit. That could be dangerous and is probably avoidable.
   • Regedit is legitimate well documented essential official MS tool that I have often used. However Regedit may easily break a Windows computer. It is a tool novices or naive uses should not try to use.
   • Often it is not essential to remove Registry entries once malware files are removed. (Kovter Trojan being one exception)
   • Other tools or scripts should be able to accomplish the Registry changes in a safe manner.
   • Some sites even deliberately stress the dangers of Regedit to persuade readers to use paid for services. The article you linked to states

     To remove this browser hijacker, you can either use a specialized malware removal tool like SpyHunter (recommended for novice users), or perform a manual removal on your own (only recommended for computer geeks).

     The article should just have used alternative methods avoiding use of Regedit.

Following jscher2000s search tip, with the additional criteria of avoiding Regedit and Spywarehunter I found this guide that in my opinion looks more suitable

• MalwareTips: Remove Trotux.com redirect (Virus Removal Guide) Filed Under: Browser Hijackers https://malwaretips.com/blogs/remove-trotux-virus/

That uses free and respected tools, has an explanation about trotux, and avoids the use of Regedit. The instructions are clear with screenshots and not aimed just at computer geeks. So I hope you do not mind me taking the liberty of adding that link to your post.

John

I suppose I should have just said the alternative was scareware as it includes this

Friendly reminder: The free version of SpyHunter only support malware detection. So, you need to upgrade it to the registered version if you want to fix the threats.

So it tells you you have something you already know you have then asks for money.