<p></p>
<p dir="auto">When I run system tests, I replace</p>
<div class="highlight highlight-source-ruby" dir="auto"><pre class="notranslate">  <span class="pl-en">driven_by</span> <span class="pl-pds">:selenium</span><span class="pl-kos">,</span> <span class="pl-pds">:using</span> <span class="pl-c1">=></span> <span class="pl-pds">:headless_firefox</span> <span class="pl-k">do</span> |<span class="pl-s1">options</span>|
    <span class="pl-s1">options</span><span class="pl-kos">.</span><span class="pl-en">add_preference</span><span class="pl-kos">(</span><span class="pl-s">"intl.accept_languages"</span><span class="pl-kos">,</span> <span class="pl-s">"en"</span><span class="pl-kos">)</span>
  <span class="pl-k">end</span></pre></div>
<p dir="auto">with</p>
<div class="highlight highlight-source-ruby" dir="auto"><pre class="notranslate">  <span class="pl-en">driven_by</span> <span class="pl-pds">:selenium</span><span class="pl-kos">,</span> <span class="pl-pds">:using</span> <span class="pl-c1">=></span> <span class="pl-pds">:firefox</span> <span class="pl-k">do</span> |<span class="pl-s1">options</span>|
    <span class="pl-s1">options</span><span class="pl-kos">.</span><span class="pl-en">add_preference</span><span class="pl-kos">(</span><span class="pl-s">"intl.accept_languages"</span><span class="pl-kos">,</span> <span class="pl-s">"en"</span><span class="pl-kos">)</span>
    <span class="pl-s1">options</span><span class="pl-kos">.</span><span class="pl-en">binary</span> <span class="pl-c1">=</span> <span class="pl-s">"/path/to/firefox/binary/not/from/snap"</span>
  <span class="pl-k">end</span></pre></div>
<p dir="auto">in <code class="notranslate">test/application_system_test_case.rb</code> because I don't run all of the tests and I want to see what the browser does on the tests I run.</p>

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