<table><tr><td style="">alukichev added a comment.
</td><a style="text-decoration: none; padding: 4px 8px; margin: 0 8px 8px; float: right; color: #464C5C; font-weight: bold; border-radius: 3px; background-color: #F7F7F9; background-image: linear-gradient(to bottom,#fff,#f1f0f1); display: inline-block; border: 1px solid rgba(71,87,120,.2);" href="https://phabricator.kde.org/D26753">View Revision</a></tr></table><br /><div><div><blockquote style="border-left: 3px solid #8C98B8;
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<div style="font-style: normal;
padding-bottom: 4px;">In <a href="https://phabricator.kde.org/D26753#596575" style="background-color: #e7e7e7;
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<div style="margin: 0;
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(Preferences > Browsing > [ ] Allow Pepper Pluginf (Flash player)).</p></div>
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<p>I think, that checkbox disables/enables another thing: <strong>all</strong> plugins that use pepper API. It controls the <tt style="background: #ebebeb; font-size: 13px;">QWebEngineSettings::PluginsEnabled</tt> setting, which, according to [1]:</p>
<blockquote style="border-left: 3px solid #a7b5bf; color: #464c5c; font-style: italic; margin: 4px 0 12px 0; padding: 4px 12px; background-color: #f8f9fc;"><p>Enables support for Pepper plugins, such as the Flash player. Disabled by default.</p></blockquote>
<p>This patch, on the other hand, tries to act on another setting: <tt style="background: #ebebeb; font-size: 13px;">QWebEngineSettings::PdfViewerEnabled</tt>, which:</p>
<blockquote style="border-left: 3px solid #a7b5bf; color: #464c5c; font-style: italic; margin: 4px 0 12px 0; padding: 4px 12px; background-color: #f8f9fc;"><p>Specifies that PDF documents will be opened in the internal PDF viewer instead of being downloaded. Enabled by default. (Added in Qt 5.13)</p></blockquote>
<p>Unchecking the checkbox you've mentioned may work because the internal PDF viewer uses pepper API. It is not fair for the user, though, to force them to disable <strong>all</strong> plugins that use pepper just because of internal PDF viewer.</p>
<p>Making that setting be controlled through another checkbox might be a good idea! The problem is that the setting exists only for Qt 5.13 and above, so I don't know how to make it conditionally used in <tt style="background: #ebebeb; font-size: 13px;">lib/preferences/preferences.ui</tt>...</p>
<p>Links:</p>
<ol class="remarkup-list">
<li class="remarkup-list-item"><a href="https://doc.qt.io/qt-5/qwebenginesettings.html#WebAttribute-enum" class="remarkup-link" target="_blank" rel="noreferrer">QWebEngineSettings documentation</a></li>
</ol></div></div><br /><div><strong>REPOSITORY</strong><div><div>R875 Falkon</div></div></div><br /><div><strong>REVISION DETAIL</strong><div><a href="https://phabricator.kde.org/D26753">https://phabricator.kde.org/D26753</a></div></div><br /><div><strong>To: </strong>alukichev, Falkon<br /><strong>Cc: </strong>SGOrava, falkon, alukichev, grune, akilgus, siraj_qazi, saishm, anmolgautam, iodelay, spoorun, ptabis, navarromorales, clivej, mparillo, ach<br /></div>