Clearing the cache cleans up a lot of cookies and unnecessary garbage that gets collected in your browser cache, it "remembers" places you visited, sites you went to, it stores cookies and when this list gets really bloated, everything slows down.
There are two things to check, in your Firefox settings go to Privacy & Security, scroll until you see Cookies and Site Data. Notice there are THREE choices over to the right:
Clear Data
Manage Data
Manage Exceptions
We are only interested in the top two. If you click on the top one, you are presented a window where there are two boxes already checked.
See top left photo. UNCHECK the top one that says Cookies and Site Data.
See top right photo. This is where all your recently used logins and passwords are stored so if you clear ALL the data, you will have to login again to the sites that you used a password on and you will have to login with username and password.
Leave the bottom box checked that says Cached Web Content and click the CLEAR button down in the right lower corner. This will clear the cache, but not the cookies. This will speed things up globally not just castboolits.
Here's the important part.
Click the middle box that says Manage Data,
See bottom left photo with red arrow. This will open a new window where it lists ALL your cookies, you can click the headers at the top to arrange them by Cookies, Storage, and Last Used. Here you can pick and choose which cookies you want to keep (which sites you don't want to lose your login) and you can use the ctrl key and the mouse click to hilight each entry you want to remove, you can choose Remove Selected, then Save Changes to get rid of the cookies.
If you JUST want to delete the cookie that corresponds to castboolits, hilight and remove the
gunloads.com cookie.
See bottom right photo. Close Firefox and re-open it, your castboolits pages should load faster, mine do.
If you don't care and want to wack a mole on all of it, hit the Clear Data button I mentioned earlier, and leave both boxes checked, that will clear your cache.
Sorry I cannot help out with Chrome as I am not a user, but the process is still the same, you just have to google how to do it in Chrome.
Here are some photos that will help you find these choices in Firefox.
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