diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 6d2e9ebf..3d7cf99e 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -10,29 +10,30 @@ Unclear report can be left unfixed for long time.
 
 Here is a list of typical questions I asked to existing reports:
 
- * Does the problem appear with the [latest develpment build](http://piro.sakura.ne.jp/xul/xpi/nightly/)?
+ * **Does the problem appear with the [latest develpment build](http://piro.sakura.ne.jp/xul/xpi/nightly/)?**
    Possibly, problems you met has been resolved already.
    On Firefox 43 and later you need to set `xpinstall.signatures.required` to `false` via `about:config`, to try such unsigned packages of development builds.
    For Firefox 46 and later, you'll have to try an unbranded Firefox (including Beta, Aurora, and Nightly) to try development builds because the option will be removed on official Firefox 46 and later.
- * Does the problem appear without Tab Mix Plus or something other tab related addon?
+ * **Does the problem appear without Tab Mix Plus or something other tab related addon?**
    If a compatibility issue with other addons is reported without such information, it is very hard to be resolved.
    See also the next.
- * Does the problem appear with a clean profile?
+ * **Does the problem appear with a clean profile?**
    You can start Firefox with temporary clean profile by a command line `-profile`, like: `"C:\Program Filex (x86)\Mozilla Firefox\firefox.exe" -no-remote -profile "%Temp%\FirefoxTemporaryProfile"`
 
 Then, please report the bug with these information:
 
- * Detailed steps to reproduce the problem. For example:
+ * **Detailed steps to reproduce the problem.** For example:
    1. Prepare Firefox version XX with plain profile.
    2. Install TST version XXXX.
    3. Install another addon XXXX version XXXX from "http://....".
    4. Click a button on the toolbar.
    5. ...
- * Expected result.
- * Actual result.
- * Platform information.
+ * **Expected result.**
+   If you have any screenshot or screencast, it will help me more.
+ * **Actual result.**
+   If you have any screenshot or screencast, it will help me more.
+ * **Platform information.**
    If the problem appear on your multiple platforms, please list them.
- * Screenshot images or screencast, if possible.
 
 ## Feature requests can be tagged as "out of purpose"
 
@@ -40,6 +41,7 @@ Please see [the readme page](./README.md) before you post a new feature request.
 Even if a requested feature is very useful, it is possibly rejected by the project policy.
 
 Instead, please tell me other addon which provide the feature and report a new issue as "compatibility issue with the addon, TST should work together with it".
+I'm very positive to make TST compatible to other addons.
 
 ## Translations, pull requests