tickets #117859
**Steps:**
1. "1. Open Preferences window via *"Edit *""Edit -\> Preferences"*.
Preferences""*.
2. In "General", ""General"", change "When ""When Firefox starts" behavior starts"" behaver to "Show ""Show a
blank page"
page""
3. Verify that `<profile-directory>/prefs.js` is written to after making
a preference change.
Notes:
1) The prefs.js director is like:
~/.mozilla/firefox/\*.default/prefs.js
2) The "XXX.default" ""XXX.default"" is defined in ~/.mozilla/firefox/profiles.ini.
3) Ref:
Test <a href="" http:="" data-www-archive.mozilla.org="" data-quality=""
data-browser="" data-front-end="" data-testcases="" data-prefs=""
accept="" data-change-save.html""="">Test Case Description for: Changing
a preference preference</a>
#### <span fxn-overview""=""></span>
**Expected Result:**
**vp3.** ","**vp3.** The preference change should be saved successfully through
UI check (blank start page) and prefs.js check (size and change date).
1. "1. Open Preferences window via *"Edit *""Edit -\> Preferences"*.
Preferences""*.
2. In "General", ""General"", change "When ""When Firefox starts" behavior starts"" behaver to "Show ""Show a
blank page"
page""
3. Verify that `<profile-directory>/prefs.js` is written to after making
a preference change.
Notes:
1) The prefs.js director is like:
~/.mozilla/firefox/\*.default/prefs.js
2) The "XXX.default" ""XXX.default"" is defined in ~/.mozilla/firefox/profiles.ini.
3) Ref:
Test <a href="" http:="" data-www-archive.mozilla.org="" data-quality=""
data-browser="" data-front-end="" data-testcases="" data-prefs=""
accept="" data-change-save.html""="">Test Case Description for: Changing
a preference preference</a>
#### <span fxn-overview""=""></span>
**Expected Result:**
**vp3.** ","**vp3.** The preference change should be saved successfully through
UI check (blank start page) and prefs.js check (size and change date).