Nice looking epub extension. Works as intended.

The author of QiuReader has managed to make an exceptionally usable reader using existing libraries, with only a handful of minor issues.

It is light, fast, cosmetically nicer has intuitive controls and supports more expected functionality than "ePUB Reader" or "EPUBReader" (even allowing a mini library), while asking only for the most minimal permissions it can ( "Access browser tabs" ).

The performance and flexibility is largely is due to Futurepress' "epub.js" (https://github.com/futurepress/epub.js) , which does all of the heavy lifting.

Current issues as I see it are as follows:
- No page numbers.
- Changing settings or view format does not track your position (workaround this using bookmarks).
- The table of contents does nto track your progress
- Occasionally there seems to be lag in the page rendering, likely an epub.js issue.
- No RtL or vertical text support (the developer may be working on this but epub doesn't officially support it either).

I would like to see these things added in addition:
- TTS (text to speech) integration with the browser
- A document "map" alternative to the table of contents
- A navigable "progress bar" ala FBReader (could be an adoptation of the TOC)

notes:
- A user reported the TOC cannot be hidden, to do this, click the "hamburger" icon.
- I have had no issues with saved information or highlighting.
- I hope someone at Mozilla recognizes QiuReader for review as a Recommended Extension, it deserves that.

为什么显示目录会特别卡？
其他地方都非常出色

great

在PC上使用，字体不能调节更大，行间距亦然，只能默认，否则每节末尾有或多或少的段落文字看不到。

简介实用，有竖屏滚动模式特别好评，功能上还有很多可以增加的，比如不能自定义字体、没法修改版面宽度，不过这两点自己F12改下元素样式就能搞定问题不大。

真正问题比较大的是注释不能点击出现小窗口显示，而是直接跳转到注释，然后再点下注释跳回来，容易打断阅读体验。还有三点不是很重要的说下个人看法，第一就是比较希望能添加一键展开全部目录功能，在一些工具书的检视阅读时会很提高效率；第二就是滚动阅读时在一个章节阅读完后没法滚入下一个章节，需要通过点击目录来完成，如果阅读到一章尾部能出现提示性进入下章的按钮或者快捷键就好了；第三就是希望一些超链接不要跟正文一个颜色，最好也能自定义颜色。

以上是暂时想到的，希望插件越做越好

Very good and beautiful epub reader! Almost the best!

Very nice reader. Full functions and nice reading experience, good job.

it would be a great add-ons if three was TTS ( Text To Speech ) support , recent Microsoft edge browser remove epub support .

Very, very nice!

Although the add-on has many useful customization features, the largest drawback is that often, parts of the book are completely cut out. The only way to fix this is by exiting/entering screen formatting, generally through full screen mode.

I really like this extension. The only issue I have is there doesn't seem to be a page width option? I really just want to be able to set the width of the page to a fixed size.

Everything is nice, yeah. I like it. And, not like EPUBReader, it won't take over your epub files when you try to download one. A five-star extension.