\section{Results\label{sec:resul}}

%\includegraphics[width=\linewidth]{figures/pdf/01_3rdparty.pdf}

This section introduces all the findings in this work. The main priority is the variable \texttt{tracking\_hints}, as the work tries to identify relationships between trackings and cookies. Every graph in this work is filtered for \texttt{tracking\_hints=yes}. Meaning the tables retrieved are larger than those visualized in this work. 

\begin{figure}[h]
    \centering
    \includegraphics[
        width=\linewidth,
    ]{figures/png/02_browser.png}
    \caption{Tracking hints on each chromium and firefox}
    \label{fig:resul:02_browser}
\end{figure}


The first figure, \autoref{fig:resul:02_browser}, illustrates the distribution of tracking hints across browsers and search engines. DuckDuckgo appears to be the Search~Engine that caches and identify most hints to tracking. Bing and Brave appear to conservative addressing any tracking hints. While only on DuckDuckGo and Google, the choice of web-browser seem to play a crucial role. Chromium addresses more hints to tracking in Google than Firefox does.


Furthermore, request cookies counts and response cookies counts will be presented in the Results below, which will be the main focus of the following results.

\begin{figure}[h]
    \centering
    \includegraphics[
        width=\linewidth,
    ]{figures/png/03_proxy-request.png}
    \caption{Proxy mode configuration for request cookies}
    \label{fig:resul:03_proxy_request}
\end{figure}


Figures~\ref{fig:resul:03_proxy_request} and~\ref{fig:resul:04_proxy_response} illustrate the cookie counts for each tracking hint. DuckDuckGo and Brave show no cookies across all \texttt{tracking\_hints}. In contrast, only Bing and Google use cookies on entries identified as tracking hints. The number above the name of the Search~Engine indicates the number of cookies, and the left bar indicates how many instances of those are associated with a tracking hint. Both Bing and Google shows cookies count on requests, but only Google shows cookies count on response. 


Figures~\ref{fig:resul:03_proxy_request} and~\ref{fig:resul:04_proxy_response} express how using a proxy influences tracking hits on the web. Using Tor as a proxy returns no cookie responses on tracking hints, while some cookies still leak through in request cookies associated with tracking hints.




\begin{figure}[H]
    \centering
    \includegraphics[
        width=\linewidth,
    ]{figures/png/04_proxy-response.png}
    \caption{Proxy mode configuration for response cookies}
    \label{fig:resul:04_proxy_response}
\end{figure}




In \autoref{sec:appen:figures} additional visualization on cookies comparison on request and responses are added. 

% \subsection{Dataset overview}

% \subsection{Exploratory Data Analysis}

% \subsection{Cookie activity by search engine}

% \subsection{Third-party request analysis}

% \subsection{Tracking-related domains}

% \subsection{Temporal patterns}

% \subsection{Outliers and anomalies}

% \subsection{Summary of findings}