Classes are not strictly required for message passing (Self demonstrated this long ago), but they exist to create structure: to group behavior within a coherent context. So when you look at the browser, you should also look at it like this:
Американские сенаторы захотели принудить Трампа прекратить удары по Ирану14:51，这一点在同城约会中也有详细论述
，这一点在PDF资料中也有详细论述
第五十三条 纳税人实施不具有合理商业目的的安排而减少、免除、推迟缴纳增值税税款，或者提前退税、多退税款的，税务机关可以依照《中华人民共和国税收征收管理法》和有关行政法规的规定予以调整。
FT Digital Edition: our digitised print edition，这一点在电影中也有详细论述
According to James’ office, Valve facilitates and even assists third-party marketplaces in their operations, based on its investigation. Engadget has asked Valve for a statement about the lawsuit, but we have yet to hear back. However, the company previously denied being involved with third-party marketplaces that allow the sales of its game items for real-world money. In a response to an inquiry by the Danish Gambling Authority, Valve explained that those third-party websites create sock puppet accounts to sell and receive items on Steam in exchange for cash. “[T]his behavior is in violation of our terms of service,” Valve said.