The content that appears on the machine due to the AlphaSpeedBooster browser extension pushes and promotes various potentially unwanted programs. Potentially unwanted programs like this are considered possibly malicious or annoying, and intrusive, but it is not normal to consider this app malware. The PUA cannot be dangerous, but there are various redirects caused by the program and pop-ups that possibly deliver questionable and dangerous material.
You cannot be sure that the material shown on the screen is safe to visit. Third-parties also rely on shady business techniques and tracking cookies. These sponsors and other advertisers can create more problems with their redirects and other activities. You need to get rid of the shady browser plugin and clear the machine from any possibly malicious applications or files.