What powers bf-lessson.com?
Last seen Jun 2026 · 16 technologies across 12 categories
Analytics
Google Analytics
since Apr 2019
Authentication
Facebook Login
since Jun 2021
JavaScript graphics
JavaScript libraries
Swiper
since Sep 2022
Miscellaneous
Open Graph
since Sep 2022
PaaS
Amazon Web Services
since Apr 2019
Programming languages
Tag managers
Google Tag Manager
since Oct 2022
UI frameworks
Video players
Web server extensions
Web servers
Amazon EC2
since Apr 2019
Audience
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
0.79 / 10 · ranked #16,748,265 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 20.5 MB · 97 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.