4chan Mass Reply browser extension

Inspired by /tv/'s posting culture, this browser extension aims to facilitate the creation of mass replies on 4chan.org and 4channel.org.

Features:

Anonymize image uploads by randomizing hash and filename
Bypass ban evasion detection by stripping the cookies and modifying useragent
Bypass common wordfilters by replacing one of the characters with a similar looking one (homoglyph)
Automatically slide captcha it into the right position
Reattach the last selected file
Configurable mass reply with multiple targets
Built-in copypastas

Use the buttons in the reply box for (left to right):

Clear comment field
Paste clipboard into the comment field
Append "sneed"
Convert quotelinks into soyquotes (for example: >>1234456 in the comment field will be replaced with the quoted content of that post without a link to it)
Convert quotelinks into filename quotes
Reply to every post on the page
Reply to posts with repeating digits in the post number
Reply to 1-post-by-this-ID
Reply to /pol/ memeflag posts
Rank IDs by their post count
Quote knowyourmeme.com filenames

Download 4chan-mass-reply-unpacked.zip from the Releases section and sideload it.

With Kiwi Browser (WebView), download 4chan-mass-reply-unpacked.zip from Releases section and install the extension via ( ⋮ ) -> Extensions.
With SmartCookieWeb Preview (GeckoView), go to about:config, set xpinstall.signatures.required to false, download 4chan_mass_reply.xpi from Releases section and sideload the extension via Advanced settings -> Sideload XPI.

$ npm install --save-dev
$ npm run build

The resulting extension will be in dist/.