diff --git a/src/Archive/Redirect.js b/src/Archive/Redirect.js
index 12a88b1..648a148 100644
--- a/src/Archive/Redirect.js
+++ b/src/Archive/Redirect.js
@@ -1,8 +1,8 @@
-import Notice from '../classes/Notice.js'
-import { Conf } from '../globals/globals.js'
-import $ from '../platform/$.js'
-import CrossOrigin from '../platform/CrossOrigin.js'
-import { DAY, dict } from '../platform/helpers.js'
+import Notice from '../classes/Notice'
+import { Conf } from '../globals/globals'
+import $ from '../platform/$'
+import CrossOrigin from '../platform/CrossOrigin'
+import { DAY, dict } from '../platform/helpers'
 import archives from './archives.json'
 /*
  * decaffeinate suggestions:
diff --git a/src/Menu/ReportLink.js b/src/Menu/ReportLink.js
index 3969948..fd39752 100644
--- a/src/Menu/ReportLink.js
+++ b/src/Menu/ReportLink.js
@@ -45,7 +45,7 @@ var ReportLink = {
     const { url, dims } = ReportLink
     const id = Date.now()
     const set = `toolbar=0,scrollbars=1,location=0,status=1,menubar=0,resizable=1,${dims}`
-    return window.open(url, id, set)
+    return window.open(url, `report${id}`, set)
   },
 }
 export default ReportLink
diff --git a/src/Miscellaneous/AntiAutoplay.js b/src/Miscellaneous/AntiAutoplay.js
index cbac766..9ecca0a 100644
--- a/src/Miscellaneous/AntiAutoplay.js
+++ b/src/Miscellaneous/AntiAutoplay.js
@@ -22,7 +22,7 @@ var AntiAutoplay = {
       name: 'Disable Autoplaying Sounds',
       cb: this.node,
     })
-    return $.ready(() => this.process(d.body))
+    return $.ready(() => this.process(doc))
   },
 
   stop(audio) {
diff --git a/src/Miscellaneous/Banner.js b/src/Miscellaneous/Banner.js
index c27f51e..264842f 100644
--- a/src/Miscellaneous/Banner.js
+++ b/src/Miscellaneous/Banner.js
@@ -90,7 +90,7 @@ var Banner = {
         Banner.original[this.className] = this.cloneNode(true)
       }
       this.contentEditable = true
-      for (var br of $$('br', this)) {
+      for (var br of $$('br', this.parentNode)) {
         $.replace(br, $.tn('\n'))
       }
       return this.focus()
@@ -104,7 +104,7 @@ var Banner = {
     },
 
     blur() {
-      for (var br of $$('br', this)) {
+      for (var br of $$('br', this.parentNode)) {
         $.replace(br, $.tn('\n'))
       }
       if ((this.textContent = this.textContent.replace(/\n*$/, ''))) {
diff --git a/src/Miscellaneous/ExpandComment.js b/src/Miscellaneous/ExpandComment.js
index 8d6be4e..ddc40bc 100644
--- a/src/Miscellaneous/ExpandComment.js
+++ b/src/Miscellaneous/ExpandComment.js
@@ -51,10 +51,7 @@ var ExpandComment = {
     }
     a.textContent = `Post No.${post} Loading...`
     return $.cache(
-      g.SITE.urls.threadJSON({
-        boardID: post.boardID,
-        threadID: post.threadID,
-      }),
+      g.SITE.urls.threadJSON(post.thread.ID, post.thread.page),
       function () {
         return ExpandComment.parse(this, a, post)
       },
@@ -83,7 +80,7 @@ var ExpandComment = {
 
     const { posts } = req.response
     if ((spoilerRange = posts[0].custom_spoiler)) {
-      g.SITE.Build.spoilerRange[g.BOARD] = spoilerRange
+      g.SITE.Build.spoilerRange = spoilerRange
     }
 
     for (postObj of posts) {
@@ -102,13 +99,8 @@ var ExpandComment = {
     // Fix pathnames
     for (var quote of $$('.quotelink', clone)) {
       var href = quote.getAttribute('href')
-      if (href[0] === '/') {
-        continue
-      } // Cross-board quote, or board link
-      if (href[0] === '#') {
-        quote.href = `${a.pathname.split(/\/+/).splice(0, 4).join('/')}${href}`
-      } else {
-        quote.href = `${a.pathname.split(/\/+/).splice(0, 3).join('/')}/${href}`
+      if (href && !href.match(/^https?:/)) {
+        quote.setAttribute('href', g.SITE.urls.thread(post.thread.ID) + href)
       }
     }
     post.nodes.shortComment = comment
diff --git a/src/Miscellaneous/ExpandThread.js b/src/Miscellaneous/ExpandThread.js
index a1507b0..5ea90af 100644
--- a/src/Miscellaneous/ExpandThread.js
+++ b/src/Miscellaneous/ExpandThread.js
@@ -105,26 +105,25 @@ var ExpandThread = {
   },
 
   expand(thread, a) {
-    let status
-    ExpandThread.statuses[thread] = status = {}
-    a.textContent = g.SITE.Build.summaryText(
-      '...',
-      ...Array.from(a.textContent.match(/\d+/g)),
-    )
-    status.req = $.cache(
-      g.SITE.urls.threadJSON({ boardID: thread.board.ID, threadID: thread.ID }),
-      function () {
-        if (this !== status.req) {
-          return
-        } // aborted
-        delete status.req
-        return ExpandThread.parse(this, thread, a)
-      },
-    )
-    return (status.numReplies = $$(
-      g.SITE.selectors.replyOriginal,
-      thread.nodes.root,
-    ).length)
+    const status = (ExpandThread.statuses[thread.ID] = {
+      numReplies: 0,
+      req: null,
+    })
+    const req = new XMLHttpRequest()
+    status.req = req
+    req.open('GET', thread.url, true)
+    req.responseType = 'document'
+    req.onload = function () {
+      if (req.status === 200) {
+        return ExpandThread.expandCb(thread, a, req.response)
+      } else { // 404, 403, etc.
+        return ExpandThread.contract(thread, a, thread.nodes.root)
+      }
+    }
+    req.onerror = function () {
+      return ExpandThread.contract(thread, a, thread.nodes.root)
+    }
+    return req.send()
   },
 
   contract(thread, a, threadRoot) {
@@ -152,9 +151,8 @@ var ExpandThread = {
     for (var reply of replies) {
       // rm clones
       if (Conf['Quote Inlining']) {
-        var inlined
-        while ((inlined = $('.inlined', reply))) {
-          inlined.click()
+        for (var quote of $$('.quote', reply)) {
+          $.rm(quote)
         }
       }
       postsCount++
diff --git a/src/Miscellaneous/FileInfo.tsx b/src/Miscellaneous/FileInfo.tsx
index ed2cbfc..950fccc 100644
--- a/src/Miscellaneous/FileInfo.tsx
+++ b/src/Miscellaneous/FileInfo.tsx
@@ -105,10 +105,7 @@ var FileInfo = {
     },
     n() {
       const fullname = this.file.name
-      const shortname = SW.yotsuba.Build.shortFilename(
-        this.file.name,
-        this.isReply,
-      )
+      const shortname = this.file.url.match(/[^/]*$/)[0]
       if (fullname === shortname) {
         return { innerHTML: E(fullname), [isEscaped]: true }
       } else {
diff --git a/src/Miscellaneous/IDColor.js b/src/Miscellaneous/IDColor.js
index 118a9ad..76e21d1 100644
--- a/src/Miscellaneous/IDColor.js
+++ b/src/Miscellaneous/IDColor.js
@@ -43,16 +43,28 @@ var IDColor = {
   compute(uid) {
     // Convert chars to integers, bitshift and math to create a larger integer
     // Create a nice string of binary
-    const hash = g.SITE.uidColor ? g.SITE.uidColor(uid) : parseInt(uid, 16)
-
+    let hash;
+    if (typeof g !== 'undefined' && g.SITE && g.SITE.uidColor) {
+      hash = g.SITE.uidColor(uid);
+    } else {
+      hash = parseInt(uid, 16);
+    }
+  
     // Convert binary string to numerical values with bitshift and '&' truncation.
-    const rgb = [(hash >> 16) & 0xff, (hash >> 8) & 0xff, hash & 0xff]
-
+    const rgb = [(hash >> 16) & 0xff, (hash >> 8) & 0xff, hash & 0xff];
+  
     // Weight color luminance values, assign a font color that should be readable.
-    rgb.push($.luma(rgb) > 125 ? '#000' : '#fff')
-
-    // Cache.
-    return (this.ids[uid] = rgb)
+    const fontColor = $.luma ? ($.luma(rgb) > 125 ? '#000' : '#fff') : '#000';
+  
+    // Cache color and font color.
+    const colorCode = `rgb(${rgb.join(',')})`;
+    this.ids[uid] = {
+      color: colorCode,
+      fontColor: fontColor
+    };
+  
+    // Return only the color.
+    return colorCode;
   },
 }
 export default IDColor
diff --git a/src/Miscellaneous/Report.js b/src/Miscellaneous/Report.js
index 182d132..7ab9495 100644
--- a/src/Miscellaneous/Report.js
+++ b/src/Miscellaneous/Report.js
@@ -93,7 +93,7 @@ var Report = {
           return Report.archiveSubmit(urls, reason.value, (results) => {
             this.action =
               '#archiveresults=' + encodeURIComponent(JSON.stringify(results))
-            return this.submit()
+              return submit.click()
           })
         }
       })
diff --git a/src/Monitoring/ThreadUpdater.js b/src/Monitoring/ThreadUpdater.js
index ab4d190..29bb994 100644
--- a/src/Monitoring/ThreadUpdater.js
+++ b/src/Monitoring/ThreadUpdater.js
@@ -206,7 +206,7 @@ var ThreadUpdater = {
         case 404:
           // XXX workaround for 4chan sending false 404s
           return $.ajax(
-            g.SITE.urls.catalogJSON({ boardID: ThreadUpdater.thread.board.ID }),
+            g.SITE.urls.catalogJSON(ThreadUpdater.thread.board),
             {
               onloadend() {
                 let confirmed
@@ -345,10 +345,7 @@ var ThreadUpdater = {
       oldReq.abort()
     }
     return (ThreadUpdater.req = $.whenModified(
-      g.SITE.urls.threadJSON({
-        boardID: ThreadUpdater.thread.board.ID,
-        threadID: ThreadUpdater.thread.ID,
-      }),
+      g.SITE.urls.threadJSON(ThreadUpdater.thread.fullID),
       'ThreadUpdater',
       ThreadUpdater.cb.load,
       { timeout: MINUTE },
@@ -386,9 +383,8 @@ var ThreadUpdater = {
     // XXX Reject updates that falsely delete the last post.
     if (
       postObjects[postObjects.length - 1].no < lastPost &&
-      new Date(req.getResponseHeader('Last-Modified')) -
-        thread.posts.get(lastPost).info.date <
-        30 * SECOND
+      postObjects.length > 1 &&
+      !OP.archived
     ) {
       return
     }
diff --git a/src/Monitoring/ThreadWatcher.js b/src/Monitoring/ThreadWatcher.js
index 6c01265..9237127 100644
--- a/src/Monitoring/ThreadWatcher.js
+++ b/src/Monitoring/ThreadWatcher.js
@@ -287,7 +287,7 @@ var ThreadWatcher = {
       } else if (Conf['Auto Watch Reply']) {
         return ThreadWatcher.add(
           g.threads.get(boardID + '.' + threadID) ||
-            new Thread(threadID, g.boards[boardID] || new Board(boardID)),
+            new Thread(threadID + '', boardID),
           cb,
         )
       }
@@ -305,7 +305,9 @@ var ThreadWatcher = {
           !e.detail.threads.includes(`${boardID}.${threadID}`)
         ) {
           if (
-            !e.detail.threads.some((fullID) => +fullID.split('.')[1] > threadID)
+            !e.detail.threads.some((fullID) => {
+              return fullID.split('.')[1] === threadID
+            })
           ) {
             continue
           }
diff --git a/src/Monitoring/Unread.js b/src/Monitoring/Unread.js
index ff94ade..3344a7c 100644
--- a/src/Monitoring/Unread.js
+++ b/src/Monitoring/Unread.js
@@ -145,7 +145,7 @@ var Unread = {
     Unread.readCount = 0
     Unread.thread.posts.forEach((post) => Unread.addPost.call(post))
 
-    $.forceSync('Remember Last Read Post')
+    $.forceSync()
     if (
       Conf['Remember Last Read Post'] &&
       (!Unread.thread.isDead || Unread.thread.isArchived)
@@ -306,7 +306,7 @@ var Unread = {
 
   saveLastReadPost: debounce(2 * SECOND, function () {
     let ID
-    $.forceSync('Remember Last Read Post')
+    $.forceSync()
     if (!Conf['Remember Last Read Post'] || !Unread.db) {
       return
     }
@@ -391,7 +391,7 @@ var Unread = {
   },
 
   saveThreadWatcherCount: debounce(2 * SECOND, function () {
-    $.forceSync('Remember Last Read Post')
+    $.forceSync()
     if (
       Conf['Remember Last Read Post'] &&
       (!Unread.thread.isDead || Unread.thread.isArchived)
diff --git a/src/Monitoring/UnreadIndex.js b/src/Monitoring/UnreadIndex.js
index b712016..017e775 100644
--- a/src/Monitoring/UnreadIndex.js
+++ b/src/Monitoring/UnreadIndex.js
@@ -171,17 +171,13 @@ var UnreadIndex = {
     const thread = Get.threadFromNode(this)
     UnreadIndex.lastReadPost[thread.fullID] = thread.lastPost
     UnreadIndex.db.set({
-      boardID: thread.board.ID,
+      boardID: g.BOARD.ID,
       threadID: thread.ID,
       val: thread.lastPost,
     })
     $.rm(UnreadIndex.hr[thread.fullID])
     thread.nodes.root.classList.remove('unread-thread')
-    return ThreadWatcher.update(g.SITE.ID, thread.board.ID, thread.ID, {
-      last: thread.lastPost,
-      unread: 0,
-      quotingYou: 0,
-    })
+    return ThreadWatcher.update(thread)
   },
 }
 export default UnreadIndex
diff --git a/src/Quotelinks/QuoteInline.js b/src/Quotelinks/QuoteInline.js
index 342f636..3e1e4e9 100644
--- a/src/Quotelinks/QuoteInline.js
+++ b/src/Quotelinks/QuoteInline.js
@@ -128,7 +128,7 @@ var QuoteInline = {
     // Will only unhide if there's no inlined backlinks of it anymore.
     if (isBacklink && Conf['Forward Hiding']) {
       $.addClass(post.nodes.root, 'forwarded')
-      post.forwarded++ || (post.forwarded = 1)
+      post.forwarded = (post.forwarded || 0) + 1
     }
 
     // Decrease the unread count if this post
@@ -152,7 +152,7 @@ var QuoteInline = {
     const qroot = $.x('ancestor::*[contains(@class,"postContainer")][1]', root)
     const { parentNode } = root
     $.rm(root)
-    $.event('PostsRemoved', null, parentNode)
+    $.event('remove', root)
 
     if (!$('.inline', qroot)) {
       $.rmClass(qroot, 'hasInline')
diff --git a/src/Quotelinks/QuotePreview.js b/src/Quotelinks/QuotePreview.js
index 344ffbe..fe74294 100644
--- a/src/Quotelinks/QuotePreview.js
+++ b/src/Quotelinks/QuotePreview.js
@@ -75,6 +75,7 @@ var QuotePreview = {
       latestEvent: e,
       endEvents: 'mouseout click',
       cb: QuotePreview.mouseout,
+      cbArgs: [this, qp],
     })
 
     if (
diff --git a/src/classes/Callbacks.js b/src/classes/Callbacks.js
index c35106b..9aa4463 100644
--- a/src/classes/Callbacks.js
+++ b/src/classes/Callbacks.js
@@ -1,11 +1,5 @@
 import Main from '../main/Main'
 
-/*
- * decaffeinate suggestions:
- * DS102: Remove unnecessary code created because of implicit returns
- * DS206: Consider reworking classes to avoid initClass
- * Full docs: https://github.com/decaffeinate/decaffeinate/blob/main/docs/suggestions.md
- */
 export default class Callbacks {
   static initClass() {
     this.Post = new Callbacks('Post')
diff --git a/src/classes/CatalogThreadNative.js b/src/classes/CatalogThreadNative.js
index 8cfc701..38de62a 100644
--- a/src/classes/CatalogThreadNative.js
+++ b/src/classes/CatalogThreadNative.js
@@ -9,15 +9,12 @@ export default class CatalogThreadNative {
   }
 
   constructor(root) {
-    this.nodes = {
-      root,
-      thumb: $(g.SITE.selectors.catalog.thumb, root),
-    }
-    this.siteID = g.SITE.ID
-    this.boardID = this.nodes.thumb.parentNode.pathname.split(/\/+/)[1]
-    this.board = g.boards[this.boardID] || new Board(this.boardID)
-    this.ID = this.threadID = +(root.dataset.id || root.id).match(/\d*$/)[0]
-    this.thread =
-      this.board.threads.get(this.ID) || new Thread(this.ID, this.board)
+    const thumb = $(g.SITE.selectors.catalog.thumb, root);
+    this.nodes = { root, thumb };
+    this.siteID = g.SITE.ID;
+    this.boardID = thumb.parentNode.pathname.split(/\/+/)[1];
+    this.board = g.boards[this.boardID] ?? new Board(this.boardID);
+    this.ID = this.threadID = +root.dataset.id || $(root).data('id');
+    this.thread = this.board.threads.get(this.ID) ?? new Thread(this.ID, this.board);
   }
 }
diff --git a/src/classes/Post.ts b/src/classes/Post.ts
index d86a008..aae3b37 100644
--- a/src/classes/Post.ts
+++ b/src/classes/Post.ts
@@ -54,6 +54,7 @@ export default class Post {
     return el
   })()
   normalizedOriginal: any
+  static get: any
 
   toString() {
     return this.ID
diff --git a/src/classes/ShimSet.js b/src/classes/ShimSet.js
index 0ddff27..e011569 100644
--- a/src/classes/ShimSet.js
+++ b/src/classes/ShimSet.js
@@ -6,7 +6,7 @@
 import $ from '../platform/$'
 class ShimSet {
   constructor() {
-    this.elements = $.dict()
+    this.elements = $.cache()
     this.size = 0
   }
   has(value) {
diff --git a/src/platform/$.js b/src/platform/$.js
index 48e5d2b..3a926a1 100644
--- a/src/platform/$.js
+++ b/src/platform/$.js
@@ -17,7 +17,7 @@ import { debounce, dict, MINUTE, platform, SECOND } from "./helpers";
 const $ = (selector, root = document.body) => root.querySelector(selector);
 
 $.id = id => d.getElementById(id);
-
+$.cache = dict();
 $.ready = function (fc) {
   if (d.readyState !== 'loading') {
     $.queueTask(fc);