Linkbucks is a service used to place ads in links outside your website. This addon blocks it:

https://addons.mozilla.org/es/firefox/addon/block-linkbucks/?src=search

hello, it also might be an issue with adware on your system. please go to firefox > addons > extensions & remove any suspicious entries (toolbars, things that you have not installed intentionally, don't know what purpose they serve, etc). also go to the windows control panel / programs and remove all toolbars or potentially unwanted software from there and run a full scan of your system with the security software that you have in place and different other tools like the free version of malwarebytes & adwcleaner.

Remove a toolbar that has taken over your Firefox search or home page Troubleshoot Firefox issues caused by malware

Linkbucks is used on some websites typically (legitimately). However, your PC is infected with trojans if you see redirects continuously. This is quite well known problem with Linkbucks. That means you should scan your PC with anti-malware programs (or antiviruses).