diff --git a/Libraries/LibWebView/SiteIsolation.cpp b/Libraries/LibWebView/SiteIsolation.cpp
index b24ddf4027b..c937a70e4cd 100644
--- a/Libraries/LibWebView/SiteIsolation.cpp
+++ b/Libraries/LibWebView/SiteIsolation.cpp
@@ -27,6 +27,10 @@ bool is_url_suitable_for_same_process_navigation(URL::URL const& current_url, UR
if (Web::HTML::url_matches_about_blank(current_url))
return true;
+ // Make sure JavaScript URLs run in the same process.
+ if (target_url.scheme() == "javascript"sv)
+ return true;
+
// Allow cross-scheme non-HTTP(S) navigation. Disallow cross-scheme HTTP(s) navigation.
auto current_url_is_http = Web::Fetch::Infrastructure::is_http_or_https_scheme(current_url.scheme());
auto target_url_is_http = Web::Fetch::Infrastructure::is_http_or_https_scheme(target_url.scheme());
diff --git a/Tests/LibWeb/Text/expected/HTML/javascript-navigation-stays-in-same-process.txt b/Tests/LibWeb/Text/expected/HTML/javascript-navigation-stays-in-same-process.txt
new file mode 100644
index 00000000000..56ba9218d98
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/HTML/javascript-navigation-stays-in-same-process.txt
@@ -0,0 +1 @@
+Hello world, this was printed by a JavaScript navigation!
diff --git a/Tests/LibWeb/Text/input/HTML/javascript-navigation-stays-in-same-process.html b/Tests/LibWeb/Text/input/HTML/javascript-navigation-stays-in-same-process.html
new file mode 100644
index 00000000000..8f63ea250a7
--- /dev/null
+++ b/Tests/LibWeb/Text/input/HTML/javascript-navigation-stays-in-same-process.html
@@ -0,0 +1,11 @@
+
+
+Hello world, this was printed by a JavaScript navigation!
+