Bugzilla

**Found in**
* Nighty 114.0a1

**Affected versions**
* Nightly 114.0a1

**Tested platforms**
* Affected platforms: macOS 13 and Ubuntu 20.04 x64
* Unaffected platforms:  Windows 11

**Preconditions**
* in about:config, set the preference "layout.css.font-visibility.private" to 1.

**Steps to reproduce**
1. Open a private window.
2. Navigate to Wikipedia and look for the following American languages: [cherokee](https://en.wikipedia.org/wiki/Cherokee_language), [desert](https://en.wikipedia.org/wiki/Deseret_alphabet), [osage](https://en.wikipedia.org/wiki/Osage_script), [unified canadian aboriginal syllabic](https://en.wikipedia.org/wiki/Canadian_Aboriginal_syllabics).
3. Observe the fonts.

**Expected result**
* The fonts should be properly displayed in Private Browsing.

**Actual result**

During private browsing, the following languages are displaying tofu boxes:
* [cherokee](https://en.wikipedia.org/wiki/Cherokee_language), [desert](https://en.wikipedia.org/wiki/Deseret_alphabet), [osage](https://en.wikipedia.org/wiki/Osage_script), [unified canadian aboriginal syllabic](https://en.wikipedia.org/wiki/Canadian_Aboriginal_syllabics) on Ubuntu 20.04.
* [osage](https://en.wikipedia.org/wiki/Osage_script) on macOS 13. 


**Regression range**
This is not a regression, the font visibility preference is set to 3 on all previous versions: ESR, Beta, and Release.

**Additional notes**
* The tofu boxes are also displayed in private browsing when the preference "layout.css.font-visibility.private" is set to 2.
* The tofu boxes are not displayed in normal browsing or when "layout.css.font-visibility.private" is set to 3.

**Found in**
* Nighty 114.0a1

**Affected versions**
* Nightly 114.0a1

**Tested platforms**
* Affected platforms: macOS 13 and Ubuntu 20.04 x64
* Unaffected platforms:  Windows 11

**Preconditions**
* in about:config, set the preference "layout.css.font-visibility.private" to 1.

**Steps to reproduce**
1. Open a private window.
2. Navigate to Wikipedia and look for the following American languages: [cherokee](https://en.wikipedia.org/wiki/Cherokee_language), [desert](https://en.wikipedia.org/wiki/Deseret_alphabet), [osage](https://en.wikipedia.org/wiki/Osage_script), [unified canadian aboriginal syllabic](https://en.wikipedia.org/wiki/Canadian_Aboriginal_syllabics).
3. Observe the fonts.

**Expected result**
* The fonts should be properly displayed in Private Browsing.

**Actual result**

During private browsing, the following languages are displaying tofu boxes:
* [cherokee](https://en.wikipedia.org/wiki/Cherokee_language), [deseret](https://en.wikipedia.org/wiki/Deseret_alphabet), [osage](https://en.wikipedia.org/wiki/Osage_script), [unified canadian aboriginal syllabic](https://en.wikipedia.org/wiki/Canadian_Aboriginal_syllabics) on Ubuntu 20.04.
* [osage](https://en.wikipedia.org/wiki/Osage_script) on macOS 13. 


**Regression range**
This is not a regression, the font visibility preference is set to 3 on all previous versions: ESR, Beta, and Release.

**Additional notes**
* The tofu boxes are also displayed in private browsing when the preference "layout.css.font-visibility.private" is set to 2.
* The tofu boxes are not displayed in normal browsing or when "layout.css.font-visibility.private" is set to 3.

**Found in**
* Nighty 114.0a1

**Affected versions**
* Nightly 114.0a1

**Tested platforms**
* Affected platforms: macOS 13 and Ubuntu 20.04 x64
* Unaffected platforms:  Windows 11

**Preconditions**
* in about:config, set the preference "layout.css.font-visibility.private" to 1.

**Steps to reproduce**
1. Open a private window.
2. Navigate to Wikipedia and look for the following American languages: [cherokee](https://en.wikipedia.org/wiki/Cherokee_language), [deseret](https://en.wikipedia.org/wiki/Deseret_alphabet), [osage](https://en.wikipedia.org/wiki/Osage_script), [unified canadian aboriginal syllabic](https://en.wikipedia.org/wiki/Canadian_Aboriginal_syllabics).
3. Observe the fonts.

**Expected result**
* The fonts should be properly displayed in Private Browsing.

**Actual result**

During private browsing, the following languages are displaying tofu boxes:
* [cherokee](https://en.wikipedia.org/wiki/Cherokee_language), [deseret](https://en.wikipedia.org/wiki/Deseret_alphabet), [osage](https://en.wikipedia.org/wiki/Osage_script), [unified canadian aboriginal syllabic](https://en.wikipedia.org/wiki/Canadian_Aboriginal_syllabics) on Ubuntu 20.04.
* [osage](https://en.wikipedia.org/wiki/Osage_script) on macOS 13. 


**Regression range**
This is not a regression, the font visibility preference is set to 3 on all previous versions: ESR, Beta, and Release.

**Additional notes**
* The tofu boxes are also displayed in private browsing when the preference "layout.css.font-visibility.private" is set to 2.
* The tofu boxes are not displayed in normal browsing or when "layout.css.font-visibility.private" is set to 3.