I have the following code which allows me to create a .srt file to be able to download it later.

It seems to work fine, but when I use Firefox on android device, the file does download but the file format is not correct, it should be .srt instead it is .txt.

It seems to only happen with Firefox on android, on pc it seems to give no problems.

Where am I doing wrong?

const element = document.createElement("a");
const file = new Blob([value], { type: "text/plain" });
element.href = URL.createObjectURL(file);
element.download = name + num + ".srt";
document.body.appendChild(element); // Required for this to work in FireFox
element.click();