The browser may have been hijacked or attempts to hijack it may have been made.
Based on the settings of your F-Secure security product, it may block the file from running, move it to the quarantine where it cannot spread or cause harm, or ask you to select an action.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
A browser setting is pointing towards a blacklisted site. For example, the Home page or the Search page is pointing towards a site that may contain malware. If there is a bookmark to a blacklisted site then this is also detected.
A browser hijack is when the browser has been manipulated without the users consent to a specific website.
In the general case, a possible browser hijack attempt infection is due to a browser hijack by another application (spyware). If that is the case, the possible browser hijack attempt is recommended to be removed also.
It is also possible that this setting has been set intentionally and that it can then be ignored.