linkybank or linkbee slowed my connection

I've opened an account with linkybank and then I tried to access some tabs inside my account and the browser seems to load longer than I thought.. then I also tried to check with linkbee but then it seemed to slow down too. I wasn't able to open those two websites links I'm not sure what happened wrong but after that my laptop performed slower than usual. May it be because theres something wrong with their website or are there some malware on those sites? Im really not sure so I will try to reconsider using those website or joining them. I will have to search some information on the net if those websites are safe to use.