Allow fuzzy matching for plus-lighter tests (#32834)

diff --git a/css/compositing/background-blending/background-blend-mode-plus-lighter.html b/css/compositing/background-blending/background-blend-mode-plus-lighter.html
index 0816dc6..bb237b3 100644
--- a/css/compositing/background-blending/background-blend-mode-plus-lighter.html
+++ b/css/compositing/background-blending/background-blend-mode-plus-lighter.html
@@ -3,6 +3,7 @@
 <link rel="author" title="Jake Archibald" href="mailto:jakearchibald@chromium.org">
 <link rel="help" href="https://drafts.fxtf.org/compositing-2/#background-blend-mode">
 <link rel="match" href="reference/background-blend-mode-plus-lighter-ref.html">
+<meta name="fuzzy" content="maxDifference=0-1;totalPixels=0-4294967295">
 <style>
   .test {
     width: 100px;
diff --git a/css/compositing/mix-blend-mode/mix-blend-mode-plus-lighter-svg.html b/css/compositing/mix-blend-mode/mix-blend-mode-plus-lighter-svg.html
index fc5e94e..630dcd7 100644
--- a/css/compositing/mix-blend-mode/mix-blend-mode-plus-lighter-svg.html
+++ b/css/compositing/mix-blend-mode/mix-blend-mode-plus-lighter-svg.html
@@ -3,6 +3,7 @@
 <link rel="author" title="Jake Archibald" href="mailto:jakearchibald@chromium.org">
 <link rel="help" href="https://drafts.fxtf.org/compositing-2/#mix-blend-mode">
 <link rel="match" href="reference/mix-blend-mode-plus-lighter-svg-ref.html">
+<meta name="fuzzy" content="maxDifference=0-1;totalPixels=0-4294967295">
 <style>
   .blend-group {
     isolation: isolate;
diff --git a/css/compositing/mix-blend-mode/mix-blend-mode-plus-lighter.html b/css/compositing/mix-blend-mode/mix-blend-mode-plus-lighter.html
index e6fc4d7..86bf1cc 100644
--- a/css/compositing/mix-blend-mode/mix-blend-mode-plus-lighter.html
+++ b/css/compositing/mix-blend-mode/mix-blend-mode-plus-lighter.html
@@ -3,6 +3,7 @@
 <link rel="author" title="Jake Archibald" href="mailto:jakearchibald@chromium.org">
 <link rel="help" href="https://drafts.fxtf.org/compositing-2/#mix-blend-mode">
 <link rel="match" href="reference/mix-blend-mode-plus-lighter-ref.html">
+<meta name="fuzzy" content="maxDifference=0-1;totalPixels=0-4294967295">
 <style>
   .test {
     width: 100px;