From d0073ef9e55a4553ea533499e518c0f39839200d Mon Sep 17 00:00:00 2001
From: Yury Semikhatsky <yurys@chromium.org>
Date: Tue, 31 Mar 2020 13:23:35 -0700
Subject: [PATCH] chore(firefox): update cheatsheet with logging instructions
 (#1609)

---
 browser_patches/firefox/cheatsheet.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/browser_patches/firefox/cheatsheet.md b/browser_patches/firefox/cheatsheet.md
index 02321e3a6d..c53f55abde 100644
--- a/browser_patches/firefox/cheatsheet.md
+++ b/browser_patches/firefox/cheatsheet.md
@@ -13,3 +13,16 @@ In native code use
 ```c++
 nsTraceRefcnt::WalkTheStack(stderr);
 ```
+
+If the stack trace is still mangled `cat` it to `tools/rb/fix_linux_stack.py`
+
+#### [Logging](https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Gecko_Logging)
+
+```bash
+MOZ_LOG=nsHttp:5
+```
+Module name is a string passed to the `mozilla::LazyLogModule` of the corresponding component, e.g.:
+
+```c++
+LazyLogModule gHttpLog("nsHttp");
+```