Remove white backgrounds, update and remove (not used) images (#1210)

_includes/sections/browser-fingerprint.html

@@ -4,7 +4,7 @@
   <strong>Your Browser sends information that makes you unique amongst millions of users and therefore easy to identify.</strong>
 </div>
 
-<img src="/assets/img/layout/browser-fingerprint.jpg" width="439" height="350" class="img-fluid float-right" alt="Fingerprint image" style="margin-left:20px;">
+<img src="/assets/img/layout/browser-fingerprint.png" width="439" height="350" class="img-fluid float-right" alt="Fingerprint image" style="margin-left:20px;">
 
 <p>When you visit a web page, your browser voluntarily sends information about its configuration, such as available fonts, browser type, and add-ons. If this combination of information is unique, it may be possible to identify and track you without using cookies. EFF created a Tool called <a href="https://panopticlick.eff.org/">Panopticlick</a> to test your browser to see how unique it is.</p>
 

_includes/sections/cloud-storage.html

@@ -22,7 +22,7 @@ fire=""
 
 {% include cardv2.html
 title="Least Authority S4 - For Experts"
-image="/assets/img/provider/S4.jpg"
+image="/assets/img/provider/S4.png"
 description="S4 (Simple Secure Storage Service) is Least Authority's verifiably secure off-site backup system for individuals and businesses. 100% client-side encryption and open source transparency. 250GB for $9.95/month or 5TB for $25.95/month. Servers are hosted with Amazon S3 in the US."
 website="https://leastauthority.com/"
 forum="https://forum.privacytools.io/t/discussion-least-authority-s4/288"

_includes/sections/search-engines.html

@@ -6,7 +6,7 @@
 
 {% include cardv2.html
 title="searx - Decentral"
-image="/assets/img/provider/searx.jpg"
+image="/assets/img/provider/searx.png"
 description='An <a href="https://github.com/asciimoo/searx">open source</a> metasearch engine, aggregating the results of other search engines while not storing information about its users. No logs, no ads and no tracking. <a href="https://github.com/asciimoo/searx/wiki/Searx-instances">List of Instances</a> or try <a href="https://search.privacytools.io/">search.privacytools.io</a>'
 website="https://searx.me/"
 tor="http://ulrn6sryqaifefld.onion"
@@ -24,7 +24,7 @@ forum="https://forum.privacytools.io/t/discussion-startpage/284"
 
 {% include cardv2.html
 title="DuckDuckGo - USA"
-image="/assets/img/provider/DuckDuckGo.jpg"
+image="/assets/img/provider/DuckDuckGo.png"
 description='The search engine that doesn\'t track you. Some of DuckDuckGo\'s code is free software hosted at GitHub, but the core is proprietary. <span class="flag-icon flag-icon-us"></span> <a href="../../providers/#ukusa">The company is based in the USA.</a>'
 website="https://duckduckgo.com/"
 tor="http://3g2upl4pq6kufc4m.onion"
@@ -34,7 +34,7 @@ github="https://github.com/duckduckgo"
 
 {% include cardv2.html
 title="Qwant - France"
-image="/assets/img/provider/qwant.jpg"
+image="/assets/img/provider/Qwant.png"
 description='Qwants philosophy is based on two principles: no user tracking and no filter bubble. Qwant was launched in France in February 2013. <a href="https://www.qwant.com/privacy">Privacy Policy.</a>'
 website="https://www.qwant.com/"
 forum="https://forum.privacytools.io/t/discussion-qwant/286"

_includes/sections/windows10.html

@@ -4,7 +4,7 @@
   <strong>Microsoft introduced a lot of new features in Windows 10 such as Cortana. However, most of them are violating your privacy.</strong>
 </div>
 
-<img src="/assets/img/layout/Windows-10-Privacy.jpg" width="367" height="369" class="img-fluid float-right" alt="Windows 10 Privacy" style="margin-left:10px;">
+<img src="/assets/img/layout/Windows-10-Privacy.png" width="367" height="369" class="img-fluid float-right" alt="Windows 10 Privacy" style="margin-left:10px;">
 
 <ol>
   <li><strong>Data syncing is by default enabled.</strong>