diff --git a/app/controllers/uploads_controller.rb b/app/controllers/uploads_controller.rb
index 092c6a4dc9..922e4767e3 100644
--- a/app/controllers/uploads_controller.rb
+++ b/app/controllers/uploads_controller.rb
@@ -72,7 +72,7 @@ class UploadsController < ApplicationController
           content_type: MiniMime.lookup_by_filename(upload.original_filename)&.content_type,
         }
         opts[:disposition]   = "inline" if params[:inline]
-        opts[:disposition] ||= "attachment" unless FileHelper.is_image?(upload.original_filename)
+        opts[:disposition] ||= "attachment" unless FileHelper.is_supported_image?(upload.original_filename)
         send_file(Discourse.store.path_for(upload), opts)
       else
         render_404
diff --git a/app/jobs/regular/crawl_topic_link.rb b/app/jobs/regular/crawl_topic_link.rb
index 15c0c01ad0..54abf0a110 100644
--- a/app/jobs/regular/crawl_topic_link.rb
+++ b/app/jobs/regular/crawl_topic_link.rb
@@ -26,7 +26,7 @@ module Jobs
 
         # Special case: Images
         # If the link is to an image, put the filename as the title
-        if FileHelper.is_image?(topic_link.url)
+        if FileHelper.is_supported_image?(topic_link.url)
           uri = URI(topic_link.url)
           filename = File.basename(uri.path)
           crawled = (TopicLink.where(id: topic_link.id).update_all(["title = ?, crawled_at = CURRENT_TIMESTAMP", filename]) == 1)
diff --git a/app/models/upload.rb b/app/models/upload.rb
index 00f17cbead..51bd464493 100644
--- a/app/models/upload.rb
+++ b/app/models/upload.rb
@@ -112,7 +112,7 @@ class Upload < ActiveRecord::Base
   end
 
   def fix_dimensions!
-    return if !FileHelper.is_image?("image.#{extension}")
+    return if !FileHelper.is_supported_image?("image.#{extension}")
 
     path =
       if local?
@@ -219,7 +219,7 @@ class Upload < ActiveRecord::Base
             upload.sha1 = Upload.generate_digest(path)
           end
           # optimize if image
-          FileHelper.optimize_image!(path) if FileHelper.is_image?(File.basename(path))
+          FileHelper.optimize_image!(path) if FileHelper.is_supported_image?(File.basename(path))
           # store to new location & update the filesize
           File.open(path) do |f|
             upload.url = Discourse.store.store_upload(f, upload)
diff --git a/lib/email/receiver.rb b/lib/email/receiver.rb
index 3419dbda06..0e445fdddc 100644
--- a/lib/email/receiver.rb
+++ b/lib/email/receiver.rb
@@ -910,7 +910,7 @@ module Email
     end
 
     def attachment_markdown(upload)
-      if FileHelper.is_image?(upload.original_filename)
+      if FileHelper.is_supported_image?(upload.original_filename)
         "<img src='#{upload.url}' width='#{upload.width}' height='#{upload.height}'>"
       else
         "<a class='attachment' href='#{upload.url}'>#{upload.original_filename}</a> (#{number_to_human_size(upload.filesize)})"
diff --git a/lib/file_helper.rb b/lib/file_helper.rb
index d5410e0005..331b2636d8 100644
--- a/lib/file_helper.rb
+++ b/lib/file_helper.rb
@@ -11,8 +11,8 @@ class FileHelper
     )
   end
 
-  def self.is_image?(filename)
-    filename =~ images_regexp
+  def self.is_supported_image?(filename)
+    filename =~ supported_images_regexp
   end
 
   class FakeIO
@@ -104,8 +104,8 @@ class FileHelper
     @@supported_images ||= Set.new %w{jpg jpeg png gif tif tiff bmp svg webp ico}
   end
 
-  def self.images_regexp
-    @@images_regexp ||= /\.(#{supported_images.to_a.join("|")})$/i
+  def self.supported_images_regexp
+    @@supported_images_regexp ||= /\.(#{supported_images.to_a.join("|")})$/i
   end
 
 end
diff --git a/lib/file_store/s3_store.rb b/lib/file_store/s3_store.rb
index aa444ba1fc..6aca50f9f4 100644
--- a/lib/file_store/s3_store.rb
+++ b/lib/file_store/s3_store.rb
@@ -39,7 +39,7 @@ module FileStore
         content_type: opts[:content_type].presence || MiniMime.lookup_by_filename(filename)&.content_type
       }
       # add a "content disposition" header for "attachments"
-      options[:content_disposition] = "attachment; filename=\"#{filename}\"" unless FileHelper.is_image?(filename)
+      options[:content_disposition] = "attachment; filename=\"#{filename}\"" unless FileHelper.is_supported_image?(filename)
       # if this fails, it will throw an exception
       path = @s3_helper.upload(file, path, options)
       # return the upload url
diff --git a/lib/upload_creator.rb b/lib/upload_creator.rb
index 25d2eef45d..2b138950e7 100644
--- a/lib/upload_creator.rb
+++ b/lib/upload_creator.rb
@@ -37,8 +37,8 @@ class UploadCreator
       # test for image regardless of input
       @image_info = FastImage.new(@file) rescue nil
 
-      is_image = FileHelper.is_image?(@filename)
-      is_image ||= @image_info && FileHelper.is_image?("test.#{@image_info.type}")
+      is_image = FileHelper.is_supported_image?(@filename)
+      is_image ||= @image_info && FileHelper.is_supported_image?("test.#{@image_info.type}")
 
       if is_image
         extract_image_info!
diff --git a/lib/url_helper.rb b/lib/url_helper.rb
index 5df27575f8..377c7d38cd 100644
--- a/lib/url_helper.rb
+++ b/lib/url_helper.rb
@@ -36,7 +36,7 @@ class UrlHelper
 
     uri = URI.parse(url)
     filename = File.basename(uri.path)
-    is_attachment = !FileHelper.is_image?(filename)
+    is_attachment = !FileHelper.is_supported_image?(filename)
 
     no_cdn = SiteSetting.login_required || SiteSetting.prevent_anons_from_downloading_files
 
diff --git a/lib/validators/upload_validator.rb b/lib/validators/upload_validator.rb
index 72bc1febad..b546ebf155 100644
--- a/lib/validators/upload_validator.rb
+++ b/lib/validators/upload_validator.rb
@@ -18,7 +18,7 @@ class Validators::UploadValidator < ActiveModel::Validator
     extension = File.extname(upload.original_filename)[1..-1] || ""
 
     if is_authorized?(upload, extension)
-      if FileHelper.is_image?(upload.original_filename)
+      if FileHelper.is_supported_image?(upload.original_filename)
         authorized_image_extension(upload, extension)
         maximum_image_file_size(upload)
       else
diff --git a/script/downsize_uploads.rb b/script/downsize_uploads.rb
index 9812ca7abf..fae1ab4374 100644
--- a/script/downsize_uploads.rb
+++ b/script/downsize_uploads.rb
@@ -11,7 +11,7 @@ Upload.where("lower(extension) in (?)", ['jpg', 'jpeg', 'gif', 'png', 'bmp', 'ti
   count += 1
   print "\r%8d".freeze % count
   absolute_path = Discourse.store.path_for(upload)
-  if absolute_path && FileHelper.is_image?(upload.original_filename)
+  if absolute_path && FileHelper.is_supported_image?(upload.original_filename)
     file = File.new(absolute_path) rescue nil
     next unless file
 
diff --git a/script/import_scripts/base/uploader.rb b/script/import_scripts/base/uploader.rb
index 2d25a3e9ae..a9540112ba 100644
--- a/script/import_scripts/base/uploader.rb
+++ b/script/import_scripts/base/uploader.rb
@@ -40,7 +40,7 @@ module ImportScripts
     end
 
     def html_for_upload(upload, display_filename)
-      if FileHelper.is_image?(upload.url)
+      if FileHelper.is_supported_image?(upload.url)
         embedded_image_html(upload)
       else
         attachment_html(upload, display_filename)