How to remove Cosa APP+ browser plugin?

Cosa APP+ search hijacker is an example of a typical unwanted program; such programs are spread enormously these days. In this page you will see the complete guidance of Cosa APP+ hijacker removal in several tactics: utilizing anti-malware tools and manual removal technique.
GridinSoft Anti-Malware Review
It is better to prevent, than repair and repent!
Removing Cosa APP+ manually may take hours and may damage your PC in the process. I recommend you to download GridinSoft Anti-Malware for threats removal. Allows to complete scan and cure your PC during the trial period.
Gridinsoft Anti-Malware 6-day trial available.
EULA | Privacy Policy | 10% Off Coupon
Subscribe to our Telegram channel to be the first to know about news and our exclusive materials on information security.

About Cosa APP+ hijacker origins

Cosa APP+ search hijacker is a potentially unwanted application (PUA)1, that is distributed as a plugin for your web browser. It is usually advertised as an add-on for Chrome or Firefox, that helps to search some precise information, for instance, about sport events, make your web browser a lot more safe, allow downloading of any kind of video clip, and so on.

Nonetheless, the Cosa APP+ plugin is quite ineffective because all such functions are currently integrated to your web browser and/or Windows. Such advertising and marketing slogans are targeted on low-skilled computer users, such as pensioners or schoolchildren. But frequently even experienced users are getting caught on such a lure. In particular scenarios, this hijacker is dispersed along with free apps.

Here is a short info for the Cosa APP+ hijacker
Hosting AS13335 Cloudflare, Inc.
United States, San Francisco
Infection Type Browser Hijacker, Unwanted Application
IP Address
Symptoms Changed search engine; search queries redirection
Similar behavior, Wowsearch, SearchSpace
Fix Tool
To remove possible virus infections, try to scan your PC

How harmful is Cosa APP+ hijacker?

Besides its uselessness, Cosa APP+ hijacker is additionally quite unsafe for browser usage. It modifies your search engine to its specific –, and additionally changes your background, adding its watermark on your background image (or, sometimes, altering it to default with the mentioned symptom).

Besides aesthetic adjustments done by Cosa APP+ hijacker, you might discover that some of your search inquiries are redirecting to the unfamiliar sites, full of web links and advertisements – so-called doorway websites. Such websites can have the web links for malware downloading. The chance of redirecting boosts if you try to launch Google search page forcibly.

However all these activities are a lot more bothersome than truly damaging. The main threat, especially for individuals who have a huge amount of secret information in their web browsers, is embedded in information gathering capabilities. Cookie files, conversations, often-visited sites as well as various other activities are easily gathered by Cosa APP+ hijacker.

How to remove Cosa APP+ search hijacker?

  • Download and install GridinSoft Anti-Malware.
  • Open GridinSoft Anti-Malware and perform a “Standard scan“.
  • “Move to quarantine” all items.
  • Open “Tools” tab – Press “Reset Browser Settings“.
  • Select proper browser and options – Click “Reset”.
  • Restart your computer.

Browser hijackers are often very easy to delete. Usually, they have an independent application that can be located in the list of installed apps. Due to the certain marketing way of Cosa APP+ hijacker, it can be simply tracked and deleted manually. Nonetheless, if you got Cosa APP+ in the package with a free program( s), your computer may be contaminated with a lot more severe malwaretrojans, spyware or even ransomware. That’s why I ‘d suggest you to utilize anti-malware tools to remove the Cosa APP+ PUA and all other malware.

You can make use of Microsoft Defender2 – it is capable of recognizing and eliminating a wide range of malware, including named hijacker. However, significant malware, that may exist on your PC in the specified instance, can disable the Windows antivirus program by modifying the Group Policies. To stay clear of such situations, it is better to use GridinSoft Anti-Malware.

To detect and erase all unwanted programs on your computer with GridinSoft Anti-Malware, it’s better to utilize Standard or Full scan. Quick Scan is not able to find all the malicious programs, because it checks only the most popular registry entries and folders.

Main screen in GridinSoft Anti-Malware

You can see the detected malicious programs sorted by their possible harm simultaneously with the scan process. But to perform any actions against malware, you need to hold on until the scan is finished, or to stop the scan.

GridinSoft Anti-Malware during the scan

To set the action for each detected virus or unwanted program, click the arrow in front of the name of detected malicious app. By default, all malware will be removed to quarantine.

List of detected malware after the scan

Reset browser settings to original ones

To revert your browser settings, you are required to use the Reset Browser Settings option. This action cannot be intercepted by any malicious program, hence, you will surely see the result. This action can be located in the Tools tab.

Tools tab in GridinSoft Anti-Malware

After pressing the Reset Browser Settings option, the menu will be shown, where you can specify, which settings will be reverted to original.

Reset Browser Settings options

Deleteing Cosa APP+ hijacker manually

Besides using anti-malware software for browser restoration, you may choose the “Reset browser settings” function, which is usually embedded in all popular browsers.

To reset Edge, do the following steps :
  1. Open “Settings and more” tab in upper right corner, then find here “Settings” button. In the appeared menu, choose “Reset settings” option :
  2. Reseting the Edge browser

  3. After picking the Reset Settings option, you will see the following menu, stating about the settings which will be reverted to original :
For Mozilla Firefox, do the next actions :
  1. Open Menu tab (three strips in upper right corner) and click the “Help” button. In the appeared menu choose “troubleshooting information” :
  2. The first step to revert Mozilla Firefox

  3. In the next screen, find the “Refresh Firefox” option :
  4. The second step of Firefox restoration
    After choosing this option, you will see the next message :
    The last step for Firefox

If you use Google Chrome
  1. Open Settings tab, find the “Advanced” button. In the extended tab choose the “Reset and clean up” button :
  2. In the appeared list, click on the “Restore settings to their original defaults” :
  3. Finally, you will see the window, where you can see all the settings which will be reset to default :
Opera can be reset in the next way
  1. Open Settings menu by pressing the gear icon in the toolbar (left side of the browser window), then click “Advanced” option, and choose “Browser” button in the drop-down list. Scroll down, to the bottom of the settings menu. Find there “Restore settings to their original defaults” option :
  2. After clicking the “Restore settings…” button, you will see the window, where all settings, which will be reset, are shown :

As an afterword, I want to say that the time plays against you and your PC. The activity of browser hijacker must be stopped as soon as possible, because of possibility of other malware injection. This malware can be downloaded autonomously, or offered for you to download in one of the windows with advertisements, which are shown to you by the hijacker. You need to act as fast as you can.

I need your help to share this guide.

Browser hijackers are among the most large and also disruptive kinds of malware. I published this article to help you, so I wish you will help me to make the computer world completely clean of malware. Please, share this article in the social networks you use – Twitter, Reddit, Facebook – wherever.
Wilbur Woodham
How to Remove Cosa APP+?

Name: Cosa APP+

Description: Cosa APP+ - a lot of users became a victim of browser hijacker. I have a lot of friends who literally bombed me with the questions like “how to remove Cosa APP+?”. In this article we will show you how to deal with Cosa APP+ (, which may corrupt your browser’s correct performance, and create a lot of troubles while you are working.

Operating System: Windows

Application Category: Browser Hijacker

User Review
3.6 (5 votes)
Comments Rating 0 (0 reviews)


  1. More information about PUAs
  2. Detailed review of Microsoft Defender

About the author

Wilbur Woodham

I was a technical writer from early in my career, and consider IT Security one of my foundational skills. I’m sharing my experience here, and I hope you find it useful.

Leave a Reply