It works on Firefox on Windows 7. Im using 3.6.7 version.

THANK YOU SO MUCH

there is a issue when a press down the - and + buttons, the font size changes but the problem is that I am using the Youtube Playback Speed Control extension and this keys are to increese/decreese the speed, then both speed and size changes :c
btw it's awesome the extension

Świetne!!!

O melhor!

Almost perfect. Only two features lack:
1) Prolong subtitles. It would be great to be able to prolong subtitles for, say, 2-3 seconds when there is no next line, or just until the next line begins otherwise.
2) Always use subtitles stored with the video if available. Currently, if the timestamps in two languages differ, you show one stored and one translated subtitle, even if the video has stored subtitles in the second language (but the timestamps do not match the first subtitle).

你好移植者，请让插件支持字体选择，目前只有一种字体。原作者并没有将插件移植所以请你完成这个工作。Hello porters, please make the plugin support font selection, currently there is only one font. The original author didn't port the plugin so could you please finish this.

非常好，還可以下載和看到設置顔色，繼續加油。

想要一次看到两个字幕，提升自己的外语水平。这是个不错的选择

quá tuyệt vời, cảm ơn dev

brilliant add-on,truly solved problem!

使用很简单，效果很满意。
It is easy to use, and the effect is satisfying.

best