This add-on provides the exact function I need. I can add a host into proxy list on the fly. (When you browse, it tells you which hosts are blocked on the page then you can click to enable proxy for this host.)

The developer updates smartproxy very quickly and has solved the adding rules bug. So Five Star!

After updating to version 1.0.5 in firefox, the function of adding addresses from unsuccessful requests broke. Before the update everything worked fine. "Selected profile ' ' doesn`t not support rules, please select another profile". Same issue in chrome.

a realy good program that ends the frustrations of novice users!

Awesome! Best alternative of SwitchyOmega

good mozilla extension.

worth a firefox recommendation rate

Awesome extension, work smooth and fine.

Works perfectly. A lot of great features. I'm happy!

支持规则订阅好评，换掉了foxyproxy

很不错的switchyproxy的替代品

虽然有点吹毛求疵，不过要是换一个更好看的图标就好了……使用起来没发现什么问题，很方便！
Although it's a bit nitpicky, but it would be nice to change to a better-looking icon... Works perfectly!

time is 2/23/2022 , until now it is the best smartproxy ever, far more better than some omega, recommend everyone to try

使用过很多，这个是最好的。

这SmartProxy绝对是所有代理插件里面最好用的！它是一个页面中所有资源都使用同一个代理，哪怕是来自不同域名的资源都是同一个代理，这才是一般人的使用习惯嘛！switchyomega 是为每个域名制定规则，有时候一个网页涉及很多域名，就得不断添加这个那个的，还会漏掉一些导致速度很慢。SmartProxy就是我想要的功能，真是太感谢作者啦！

SmartProxy is the best proxy add-on I have ever used! It applies same proxy for a whole page, even if the page contains different domains. This behavior is what normal people would ask for. the switchyomega set proxy for each separate domain instead, and when a website contains resources from multiple domains, they must be added separately, which is painful. The behavior of SmartProxy is exactly what I want, thank you so much!

试过很多个火狐的插件，这个是最好用的代理插件。专程登陆上来评价，希望能为后面的人提供参考。

Very good, thanks!