diff --git a/pages/common/firefox.md b/pages/common/firefox.md
index 9b0be0b114..0f03cd5baa 100644
--- a/pages/common/firefox.md
+++ b/pages/common/firefox.md
@@ -9,16 +9,24 @@
 
 - Open it at a new window:
 
-`firefox -new-window {{https://www.duckduckgo.com}}`
+`firefox --new-window {{https://www.duckduckgo.com}}`
 
 - Open an incognito window:
 
-`firefox -private-window`
+`firefox --private-window`
 
 - Search 'wikipedia' on your default search engine:
 
-`firefox -search {{wikipedia}}`
+`firefox --search {{wikipedia}}`
 
 - Launch firefox without extensions:
 
-`firefox -safe-mode`
+`firefox --safe-mode`
+
+- Take a screenshot of a web page in headless mode:
+
+`firefox --headless --screenshot {{path/to/output_file.png}}  {{https://example.com/}}`
+
+- Use a specific profile directory to allow multiple separate instances of Firefox to run at once:
+
+`firefox --new-instance --profile {{path/to/directory}} {{https://example.com/}}`