Bugzilla

**Affected versions**
* 84.0a1(2020-11-15) 

**Affected platforms**
* macOS 10.15;

**Steps to reproduce**
* Firefox, OS theme set to dark;
* as I am still unsure of accurate STR:
1. Launch Firefox with a fresh profile;
2. Open a new tab;

**Expected result**
* Manage bookmarks option is displayed on the new section;

**Enhancement suggestion **
* change the color or the string to a lighter shade of blue;

**Regression range**
* will check as soon as I can get consistent STR;

**Additional notes**
* S4 as suggested severity;
* attached screenshot with the issue, not the best one; will update it once I can trigger that menu again;

**Affected versions**
* 84.0a1(2020-11-15) 

**Affected platforms**
* macOS 10.15, Windows 10;

**Steps to reproduce**
* Firefox, OS theme set to dark; 
1. Launch Firefox with a fresh profile;
2. Open the Customize window and remove Default items from the bookmarks toolbar;
3.  Open a new tab;

**Expected result**
* Manage bookmarks option is displayed on the new section;

**Enhancement suggestion **
* change the color or the string to a lighter shade of blue;

**Regression range**
* last "good": 2020-11-13;
* first "bad": 2020-11-14
* Pushlog [URL](https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=8ad7087f123c5f99ddd975dfac47f06e4a8b39f2&tochange=5c55402f9d41ec7ebc0168d2a04b51e37c7a4685)
* not a regressed behavior, introduced with patch from bug 1674091;

**Additional notes**
* S4 as suggested severity;
* attached screenshot with the issue, not the best one; will update it once I can trigger that menu again;