Storage Error when adding TODOs if too many total TODOs

[ChiNoel-osu]

I'm experiencing storage errors when saving todos. I find out that if I delete some of my todos from history (either done or not done) it will start working again.
I counted 86 TODOs total before storage errors take place.
I have 517GB free in my C drive.
Firefox 145.0.2 (64-bit) Windows

document.querySelector(".TodoList").children.length;
10
document.querySelector(".TodoList").children.length;
85
document.querySelector(".TodoList").children.length;
86
StorageError: Extension[sync]: tabliss/config: Cannot write updates to storage
    Xn moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    r moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    o moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    promise callback*Kn/< moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    a moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    a moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    setTimeout handler*gn/< moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Qn moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Wn moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Wn moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Hi moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    s moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    xo moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Jl moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    cu moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    uu moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    uu moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Ks moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Ua moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    qs moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    qs moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Gs moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Vo moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    onClick moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    He moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Fe moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Hr moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Hr moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    jr moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Br moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Qs moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Oe moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Br moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    qt moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Gt moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    a moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    bn moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Oe moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Fr moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    zr moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Ir moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    Ir moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    createRoot moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    <anonymous> moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    <anonymous> moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
    <anonymous> moz-extension://28786a43-56e6-413b-9355-971723a50ef8/main.js:2
Caused by: Error: QuotaExceededError: storage.sync API call exceeded its quota limitations.
main.js:2:232306
Caused by: Error: QuotaExceededError: storage.sync API call exceeded its quota limitations. main.js:2:232306