fix: firefox avatar icon styling inconsistency #6480

Job	Run time
php8.1 on master integration tests	45s
php8.1 on master unit tests	52s
php8.1 on stable30 integration tests	58s
php8.1 on stable30 unit tests	57s
php8.2 on master integration tests	58s
php8.2 on master unit tests	57s
php8.2 on stable30 integration tests	50s
php8.2 on stable30 unit tests	44s
php8.3 on master integration tests	53s
php8.3 on master unit tests	56s
php8.3 on stable30 integration tests	54s
php8.3 on stable30 unit tests	52s
php8.4 on master integration tests	1m 33s
php8.4 on master unit tests	2m 0s
php-test-summary	6s
	14m 15s

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