The official Blogger browser compatibility reference, Compatible browser and operating systems states Blogger requirements, very succinctly. To use Blogger, your browser must allow cookies and have JavaScript turned on. This is a very brief hint of Blogger browser support policy . Use of Blogger includes various activities. Moderate Blogger hosted comments. Post comments, as a blog reader. Edit, preview, and publish posts. View Stats. Use the Template Designer. Each of these activities, and more, require cookies and scripts - and each are vulnerable to improperly setup filters . As Blogger implies, both cookies and scripts are vulnerable to being disabled (turned off) - although the term "turned on" suggests that there is one single setting, possibly affecting each individual cookie or script. Considering the effects of layered security , we know this won't always be true.