diff --git a/README.md b/README.md
index f8d9b78..0d01d13 100644
--- a/README.md
+++ b/README.md
@@ -60,6 +60,7 @@ minify fediverse-share-button/styles.css > fediverse-share-button/styles.min.css
 
 ## To-do
 
+- Add missing icons, see `icons/todo.txt`.
 - Better development workflow.
 - Localization.
 
diff --git a/fediverse-share-button/icons/firefish.svg b/fediverse-share-button/icons/firefish.svg
index dfd1345..b3dd710 100644
--- a/fediverse-share-button/icons/firefish.svg
+++ b/fediverse-share-button/icons/firefish.svg
@@ -1,7 +1,36 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<svg class="w-6 h-6 text-gray-800 dark:text-white" aria-hidden="true"
-    xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" viewBox="0 0 24 24">
-    <path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
-        d="M9.529 9.988a2.502 2.502 0 1 1 5 .191A2.441 2.441 0 0 1 12 12.582V14m-.01 3.008H12M21 12a9 9 0 1 1-18 0 9 9 0 0 1 18 0Z" />
+<svg width="512px" height="512px" viewBox="0 0 1024 1024" fill="none" xmlns="http://www.w3.org/2000/svg">
+<title>Firefish</title>
+<g id="Firefish" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+<path d="M530.286 438.893H54.8572C24.56 438.893 0 463.451 0 493.746V969.141C0 999.436 24.56 1023.99 54.8572 1023.99H530.286C560.583 1023.99 585.143 999.436 585.143 969.141V493.746C585.143 463.451 560.583 438.893 530.286 438.893ZM146.286 877.719C105.891 877.719 73.1429 844.973 73.1429 804.581C73.1429 764.19 105.891 731.444 146.286 731.444C186.68 731.444 219.429 764.19 219.429 804.581C219.429 844.973 186.68 877.719 146.286 877.719ZM329.143 877.719C288.749 877.719 256 844.973 256 804.581C256 764.19 288.749 731.444 329.143 731.444C369.537 731.444 402.286 764.19 402.286 804.581C402.286 844.973 369.537 877.719 329.143 877.719Z" fill="url(#paint0_linear_1_112)"/>
+<path d="M530.286 438.899H54.8572C24.56 438.899 0 463.457 0 493.752V969.147C0 999.442 24.56 1024 54.8572 1024H530.286C560.583 1024 585.143 999.442 585.143 969.147V493.752C585.143 463.457 560.583 438.899 530.286 438.899ZM146.286 877.725C105.891 877.725 73.1429 844.979 73.1429 804.587C73.1429 764.196 105.891 731.449 146.286 731.449C186.68 731.449 219.429 764.196 219.429 804.587C219.429 844.979 186.68 877.725 146.286 877.725ZM329.143 877.725C288.749 877.725 256 844.979 256 804.587C256 764.196 288.749 731.449 329.143 731.449C369.537 731.449 402.286 764.196 402.286 804.587C402.286 844.979 369.537 877.725 329.143 877.725Z" fill="url(#paint1_linear_1_112)"/>
+<path d="M530.092 365.573H278.697C248.423 365.573 223.875 341.031 223.875 310.754V59.3772C223.875 10.5406 282.926 -13.9148 317.457 20.6142L568.852 271.991C603.389 306.525 578.926 365.567 530.086 365.567L530.092 365.573Z" fill="url(#paint2_linear_1_112)"/>
+<path d="M968.377 804.581H713.8C683.143 804.581 658.286 779.726 658.286 749.071V494.512C658.286 445.058 718.08 420.289 753.051 455.258L1007.63 709.817C1042.6 744.786 1017.83 804.576 968.371 804.576L968.377 804.581Z" fill="url(#paint3_linear_1_112)"/>
+<path d="M968.377 365.693H713.8C683.143 365.693 658.286 340.837 658.286 310.182V55.6232C658.286 6.16953 718.08 -18.6001 753.051 16.3688L1007.63 270.928C1042.6 305.897 1017.83 365.687 968.371 365.687L968.377 365.693Z" fill="url(#paint4_linear_1_112)"/>
+<defs>
+<linearGradient id="paint0_linear_1_112" x1="15.0914" y1="1008.91" x2="852.792" y2="171.144" gradientUnits="userSpaceOnUse">
+<stop stop-color="#000000"/>
+<stop offset="1" stop-color="#000000"/>
+</linearGradient>
+<linearGradient id="paint1_linear_1_112" x1="292.572" y1="1021.65" x2="292.572" y2="799.199" gradientUnits="userSpaceOnUse">
+<stop stop-color="#000000" stop-opacity="0.3"/>
+<stop offset="0.11" stop-color="#000000" stop-opacity="0.21"/>
+<stop offset="0.27" stop-color="#000000" stop-opacity="0.12"/>
+<stop offset="0.44" stop-color="#000000" stop-opacity="0.05"/>
+<stop offset="0.65" stop-color="#000000" stop-opacity="0.01"/>
+<stop offset="1" stop-color="#000000" stop-opacity="0"/>
+</linearGradient>
+<linearGradient id="paint2_linear_1_112" x1="-200.714" y1="790.131" x2="657.505" y2="-68.1435" gradientUnits="userSpaceOnUse">
+<stop stop-color="#000000"/>
+<stop offset="1" stop-color="#000000"/>
+</linearGradient>
+<linearGradient id="paint3_linear_1_112" x1="235.6" y1="1227.24" x2="1094.4" y2="368.38" gradientUnits="userSpaceOnUse">
+<stop stop-color="#000000"/>
+<stop offset="1" stop-color="#000000"/>
+</linearGradient>
+<linearGradient id="paint4_linear_1_112" x1="16.143" y1="1007.79" x2="874.939" y2="148.933" gradientUnits="userSpaceOnUse">
+<stop stop-color="#000000"/>
+<stop offset="1" stop-color="#000000"/>
+</linearGradient>
+</defs>
+</g>
 </svg>
-  
\ No newline at end of file