The official Mozilla Firefox Security Blog unveiled a flaw discovered by the company Internet browser user and how the problem can be fixed.
According to the blog, the user reported that there was an advertisement a particular website in Russia that was serving a trespass for the Internet browser. The exploit searches for important files and then uploads them to a server reportedly hosted in Ukraine.
The flaw emerged from the interface of the contrivance that triggers JavaScript background separation and Firefox's PDF viewer. The hacker captures only developer oriented files such as "File Transfer Protocol" found in Windows, implying that personal files are not hacked although the attack is threatening.
Mozilla Firefox released its latest version of Firefox, version 39.0.3, on Aug. 5 that has a fix for the security flaw. All Mozilla Firefox users are urged to upgrade to the latest version to be secure from the exploit.
Updating the browser requires users to click on the Help menu in the Menu Bar found at the upper left corner of their current version, CNet reported. The next step is clicking on the setting for About Firefox, which will reveal the "Update to 39.0.3" button in case you are not running on the latest version. Clicking on this button will enable Firefox to undertake an automatic update to the new, secure version before prompting the user to restart the browser.
The exploit affects both Windows and Linux operating systems and not the Firefox mobile app for Android since the program lacks the PDF viewer. Similarly, the flaw has not affected Macs yet but the company indicated that Apple's OS X would pregnable in the event a hacker targets it.
People who utilize software that blocks advertisements on the Web may have been safe from the security breach, but that still is dependent on the particular program and filters applied.