Firefox 52-x error "Access Denied You don't have permission to access...this site...on this server. Reference#...
This error shows from all latest version, going back as far as version 52, whenever I click to check out on some shopping websites, like Costa.co.uk and currys.co.uk. For… (funda kabanzi)
This error shows from all latest version, going back as far as version 52, whenever I click to check out on some shopping websites, like Costa.co.uk and currys.co.uk. For troubleshooting purposes, I copied a portable Firefox setup and added a gift card and filled in my email address on Costa website: https://gifting.costa.co.uk/home/gift-card/thank-you-little-gc.aspx I clicked to check out, but the error page shows instead of allowing me to proceed to payment. Clearing cookies/history, disabling, add-ons/running Firefox in troubleshoot mode, updating to newer Firefox doesn't solve the problem. I tried troubleshoot mode, deleting all add-ons, re-setting all about:config settings to default, but no avail. I tried deleting misc files and folders from Firefox directories and noticed that the problem is caused by: "content-prefs.sqlite" and "prefs.js", but after deleting those files or the profile folder, the error doesn't show on first load, but if I try a second time after clearing history, the error message starts showing again. The site loads next page only if I delete the data folder or use a fresh install with no add-ons/configurations. This didn't used to happen. I spent a lot of time setting up my Firefox so don't want to start over.
How can I solve this issue?