| B | ↘ | D | CurlBrowser got worse | 
| ⇢ | B | CurlBrowser::parseResponseHeadersArray() added | |
| ⇢ | A | CurlBrowser::handleRequestMethod() added | |
| ⇢ | A | CurlBrowser::setCurlOptions() added | |
| ⇢ | A | CurlBrowser::processResponse() added | |
| ⇢ | A | AbstractForm::errors() added | |
| ⇢ | A | CurlBrowser::headerCallback() added | |
| ⇢ | A | CurlBrowser::setRequestHeaders() added | |
| ⇢ | A | CurlBrowser::processResponseHeaders() added | |
| C | ↗ | A | CurlBrowser::retrieve() improved | 
| B | ↛ | CurlBrowser::parseResponseHeaders() removed |