The server installs the website security dog, when visits the website to display a bunch of similar iissafedogccsision=7z86v5h5z and so on the session authentication information.
Official explanation of the safe dog
The main reason for this character is that the user has turned on the site security dog CC Protection of the session authentication mode of the intermediate mode or Advanced mode, so the browser will follow this code for site access verification, is a normal situation. after the browser first accesses the validation pass, the character is not present in subsequent accesses.
If the user does not want to appear this validation code can be resolved by adjusting the session authentication mode of the website Security Dog's CC attack protection function to the primary mode (which is more lenient for attack verification).
Description of the session validation character appearing in the browser URL