The amazing thing about Instapaper is that its free, yep FREE for all premium features. Unlike Pocket it is simple in its UI and elegant. And the addon is simple. You can create your own folders for particular categories and read the articles stripped of advertisements and other useless webpage nonsense, all you have is text and relevant pictures. If you're using Pocket I recommend swapping to Instapaper.

Better than Pocket.

While I do use the native Firefox reading mode, Pocket has ads that are disgusted as saved items. Instapaper doesn't do this, and is free. I highly recommended it.

フォルダー指定も同時に出来てスムーズにブックマークできる。

Nice add-on for best reading app.

Creates a simple and highly usable method of saving pages to Instapaper.

its fabulous....

The best on save-for-later apps. Has speed-reading and read-out-loud options as well.

Excellent

One of the web's essential add on's, will save web pages for future reading, the premium version is free for all which makes it impossible not to use.
Also first class service from Instapaper & a seamless app
READ ADDENDUM BELOW FIRST
However, since late May,Instapaper has blocked users in the EU as it struggles to field being eady for GDPR, something it's parent company mangaged with ease.
Until it sorts this out & restores access to users, stay away, and it might be usefull if Instapaper upped it's customer service & actually talked to people

Fantastic. Much better than Pocket!
Instapaper support RTL langueges better than pocket and in instapaper you can take note from articles.

非常好