As explained in the **ps3xploit.com >Domain no Longer owned by team** (ps3xploit.me =new) instructions & in the OP of the HAN release thread, you should set the exploit page as the browser homepage & restart the browser.Alas, I'm on wifi connected to my landlord's access point/router downstairs. Sometimes my success rate in loading/enabling Han is higher if I delete the browser cache and and run it from a blank page but it's still quite inconsistent.
Clearing cache, cookies etc.. is basically pointless.
If you follow the recommendations, the exploit will initialize with the same success rate as the HAN Toolbox. It should initialize on every attempt. If ever it didn't, restart the browser rather than reloading the page.
You should never browse any web page before loading an exploit & you should never have a set homepage other than blank or the exploit page you wish to use.
Alternatively, you can set the browser homepage as blank & create a favourite for each exploit page you wish to use. Restart the browser then choose the appropriate favourite for the exploit you wish to use.