diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/MangaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/MangaParser.kt
index bf815d97..0eb6764c 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/MangaParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/MangaParser.kt
@@ -114,6 +114,11 @@ abstract class MangaParser @InternalParsersApi constructor(val source: MangaSour
 		return config[configKeyDomain]
 	}
 
+	fun getDomain(subdomain: String): String {
+		val domain = getDomain()
+		return subdomain + "." + domain.removePrefix("www.")
+	}
+
 	/**
 	 * Create a unique id for [Manga]/[MangaChapter]/[MangaPage].
 	 * @param url must be relative url, without a domain
@@ -150,34 +155,6 @@ abstract class MangaParser @InternalParsersApi constructor(val source: MangaSour
 		return h
 	}
 
-	/**
-	 * Convert relative url to an absolute using [getDomain]
-	 */
-	@Deprecated(
-		message = "Use toAbsoluteUrl() instead",
-		replaceWith = ReplaceWith(
-			"toAbsoluteUrl(getDomain(), subdomain)",
-			"org.koitharu.kotatsu.parsers.util.toAbsoluteUrl",
-		),
-	)
-	protected fun String.withDomain(subdomain: String): String {
-		return toAbsoluteUrl(getDomain(), subdomain)
-	}
-
-	/**
-	 * Convert relative url to an absolute using [getDomain]
-	 */
-	@Deprecated(
-		message = "Use toAbsoluteUrl() instead",
-		replaceWith = ReplaceWith(
-			"toAbsoluteUrl(getDomain())",
-			"org.koitharu.kotatsu.parsers.util.toAbsoluteUrl",
-		),
-	)
-	protected fun String.withDomain(): String {
-		return toAbsoluteUrl(getDomain())
-	}
-
 	@InternalParsersApi
 	@Suppress("NOTHING_TO_INLINE")
 	protected inline fun parseFailed(message: String? = null): Nothing {
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/AnibelParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/AnibelParser.kt
index 5ff44bd1..8436ee1d 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/AnibelParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/AnibelParser.kt
@@ -72,7 +72,7 @@ internal class AnibelParser(override val context: MangaLoaderContext) : MangaPar
 				id = generateUid(mediaId),
 				title = title.getString("be"),
 				coverUrl = jo.getString("poster").removePrefix("/cdn")
-					.toAbsoluteUrl(getDomain(), "cdn") + "?width=200&height=280",
+					.toAbsoluteUrl(getDomain("cdn")) + "?width=200&height=280",
 				altTitle = title.getString("alt").takeUnless(String::isEmpty),
 				author = null,
 				isNsfw = false,
@@ -112,7 +112,7 @@ internal class AnibelParser(override val context: MangaLoaderContext) : MangaPar
 		).getJSONObject("media")
 		val title = details.getJSONObject("title")
 		val poster = details.getString("poster").removePrefix("/cdn")
-			.toAbsoluteUrl(getDomain(), "cdn")
+			.toAbsoluteUrl(getDomain("cdn"))
 		val chapters = apiCall(
 			"""
 			chapters(mediaId: "${details.getString("mediaId")}") {
@@ -213,7 +213,7 @@ internal class AnibelParser(override val context: MangaLoaderContext) : MangaPar
 				id = generateUid(mediaId),
 				title = title.getString("be"),
 				coverUrl = jo.getString("poster").removePrefix("/cdn")
-					.toAbsoluteUrl(getDomain(), "cdn") + "?width=200&height=280",
+					.toAbsoluteUrl(getDomain("cdn")) + "?width=200&height=280",
 				altTitle = title.getString("en").takeUnless(String::isEmpty),
 				author = null,
 				isNsfw = false,
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/MangaTownParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/MangaTownParser.kt
index ad840e88..6042656a 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/MangaTownParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/MangaTownParser.kt
@@ -190,7 +190,7 @@ internal class MangaTownParser(override val context: MangaLoaderContext) : Manga
 	}
 
 	private suspend fun bypassLicensedChapters(manga: Manga): List<MangaChapter> {
-		val doc = context.httpGet(manga.url.toAbsoluteUrl(getDomain(), "m")).parseHtml()
+		val doc = context.httpGet(manga.url.toAbsoluteUrl(getDomain("m"))).parseHtml()
 		val list = doc.body().selectFirst("ul.detail-ch-list") ?: return emptyList()
 		val dateFormat = SimpleDateFormat("MMM dd,yyyy", Locale.US)
 		return list.select("li").asReversed().mapIndexedNotNull { i, li ->
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/NicovideoSeigaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/NicovideoSeigaParser.kt
index 603d4f19..cee01510 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/NicovideoSeigaParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/NicovideoSeigaParser.kt
@@ -1,9 +1,6 @@
 package org.koitharu.kotatsu.parsers.site
 
-import org.koitharu.kotatsu.parsers.MangaLoaderContext
-import org.koitharu.kotatsu.parsers.MangaParser
-import org.koitharu.kotatsu.parsers.MangaParserAuthProvider
-import org.koitharu.kotatsu.parsers.MangaSourceParser
+import org.koitharu.kotatsu.parsers.*
 import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.exception.AuthRequiredException
 import org.koitharu.kotatsu.parsers.model.*
@@ -13,22 +10,21 @@ import java.util.*
 private const val STATUS_ONGOING = "連載"
 private const val STATUS_FINISHED = "完結"
 
-@MangaSourceParser("NICOVIDEOSEIGA", "Nicovideo Seiga", "ja")
-class NicovideoSeigaParser(override val context: MangaLoaderContext) : MangaParser(MangaSource.NICOVIDEOSEIGA),
+@MangaSourceParser("NICOVIDEO_SEIGA", "Nicovideo Seiga", "ja")
+class NicovideoSeigaParser(override val context: MangaLoaderContext) :
+	MangaParser(MangaSource.NICOVIDEO_SEIGA),
 	MangaParserAuthProvider {
 
 	override val authUrl: String
-		get() = "https://account.nicovideo.jp/login?site=seiga"
+		get() = "https://${getDomain("account")}/login?site=seiga"
 
 	override val isAuthorized: Boolean
-		get() {
-			return context.cookieJar.getCookies(getDomain()).any {
-				it.name == "user_session"
-			}
+		get() = context.cookieJar.getCookies(getDomain("seiga")).any {
+			it.name == "user_session"
 		}
 
 	override suspend fun getUsername(): String {
-		val body = context.httpGet("https://app.nicovideo.jp/my/apps").parseHtml().body()
+		val body = context.httpGet("https://${getDomain("app")}/my/apps").parseHtml().body()
 		return body.selectFirst("#userinfo > div > div > strong")?.text() ?: throw AuthRequiredException(source)
 	}
 
@@ -37,21 +33,23 @@ class NicovideoSeigaParser(override val context: MangaLoaderContext) : MangaPars
 		SortOrder.POPULARITY,
 	)
 
-	override val configKeyDomain: ConfigKey.Domain = ConfigKey.Domain("seiga.nicovideo.jp", null)
+	override val configKeyDomain: ConfigKey.Domain = ConfigKey.Domain("nicovideo.jp", null)
 
+	@InternalParsersApi
 	override suspend fun getList(
 		offset: Int,
 		query: String?,
 		tags: Set<MangaTag>?,
-		sortOrder: SortOrder?,
+		sortOrder: SortOrder,
 	): List<Manga> {
 		val page = (offset / 20f).toIntUp().inc()
+		val domain = getDomain("seiga")
 		val url = when {
 			!query.isNullOrEmpty() -> return if (offset == 0) getSearchList(query, page) else emptyList()
-			tags.isNullOrEmpty() -> "https://${getDomain()}/manga/list?page=$page&sort=${getSortKey(sortOrder)}"
-			tags.size == 1 -> "https://${getDomain()}${tags.first().key}?page=$page&sort=${getSortKey(sortOrder)}"
+			tags.isNullOrEmpty() -> "https://$domain/manga/list?page=$page&sort=${getSortKey(sortOrder)}"
+			tags.size == 1 -> "https://$domain/manga/list?category=${tags.first().key}&page=$page&sort=${getSortKey(sortOrder)}"
 			tags.size > 1 -> throw IllegalArgumentException("This source supports only 1 category")
-			else -> "https://${getDomain()}/manga/list?page=$page&sort=${getSortKey(sortOrder)}"
+			else -> "https://$domain/manga/list?page=$page&sort=${getSortKey(sortOrder)}"
 		}
 		val doc = context.httpGet(url).parseHtml()
 		val comicList = doc.body().select("#comic_list > ul > li") ?: parseFailed("Container not found")
@@ -80,16 +78,18 @@ class NicovideoSeigaParser(override val context: MangaLoaderContext) : MangaPars
 					STATUS_FINISHED -> MangaState.FINISHED
 					else -> null
 				},
-				publicUrl = href.toAbsoluteUrl(item.host ?: getDomain()),
+				publicUrl = href.toAbsoluteUrl(item.host ?: getDomain("seiga")),
 				source = source,
 			)
 		}
 	}
 
 	override suspend fun getDetails(manga: Manga): Manga {
-		val doc = context.httpGet(manga.url.withDomain()).parseHtml()
+		val doc = context.httpGet(manga.url.toAbsoluteUrl(getDomain("seiga"))).parseHtml()
 		val contents = doc.body().selectFirst("#contents") ?: parseFailed("Cannot find root")
-		val statusText = contents.select("div.mg_work_detail > div > div:nth-child(2) > div.tip.content_status.status_series > span").text()
+		val statusText = contents
+			.select("div.mg_work_detail > div > div:nth-child(2) > div.tip.content_status.status_series > span")
+			.text()
 		return manga.copy(
 			description = contents.selectFirst("div.mg_work_detail > div > div.row > div.description_text")?.html(),
 			largeCoverUrl = contents.selectFirst("div.primaries > div.main_visual > a > img")?.attrAsAbsoluteUrlOrNull("src"),
@@ -116,7 +116,7 @@ class NicovideoSeigaParser(override val context: MangaLoaderContext) : MangaPars
 	}
 
 	override suspend fun getPages(chapter: MangaChapter): List<MangaPage> {
-		val fullUrl = chapter.url.withDomain()
+		val fullUrl = chapter.url.toAbsoluteUrl(getDomain("seiga"))
 		val doc = context.httpGet(fullUrl).parseHtml()
 		if (!doc.select("#login_manga").isEmpty())
 			throw AuthRequiredException(source)
@@ -134,7 +134,7 @@ class NicovideoSeigaParser(override val context: MangaLoaderContext) : MangaPars
 	}
 
 	override suspend fun getTags(): Set<MangaTag> {
-		val doc = context.httpGet("https://${getDomain()}/manga/list").parseHtml()
+		val doc = context.httpGet("https://${getDomain("seiga")}/manga/list").parseHtml()
 		val root = doc.body().select("#mg_category_list > ul > li") ?: parseFailed("Cannot find tags")
 		return root.mapToSet { li ->
 			val a = li.selectFirst("a") ?: parseFailed("a is null")
@@ -147,7 +147,7 @@ class NicovideoSeigaParser(override val context: MangaLoaderContext) : MangaPars
 	}
 
 	private suspend fun getSearchList(query: String, page: Int): List<Manga> {
-		val domain = getDomain()
+		val domain = getDomain("seiga")
 		val doc = context.httpGet("https://$domain/manga/search/?q=$query&page=$page&sort=score").parseHtml()
 		val root = doc.body().select(".search_result__item")
 		return root.mapNotNull { item ->
@@ -155,7 +155,7 @@ class NicovideoSeigaParser(override val context: MangaLoaderContext) : MangaPars
 			Manga(
 				id = generateUid(href),
 				url = href,
-				publicUrl = href.toAbsoluteUrl(item.host ?: getDomain()),
+				publicUrl = href.toAbsoluteUrl(item.host ?: domain),
 				title = item.selectFirst(".search_result__item__info > .search_result__item__info--title > a")
 					?.text()?.trim() ?: return@mapNotNull null,
 				altTitle = null,
@@ -171,10 +171,9 @@ class NicovideoSeigaParser(override val context: MangaLoaderContext) : MangaPars
 		}
 	}
 
-	private fun getSortKey(sortOrder: SortOrder?) =
-		when (sortOrder ?: sortOrders.minByOrNull { it.ordinal }) {
-			SortOrder.POPULARITY -> "manga_view"
-			SortOrder.UPDATED -> "manga_updated"
-			else -> "manga_view"
-		}
+	private fun getSortKey(sortOrder: SortOrder) = when (sortOrder) {
+		SortOrder.POPULARITY -> "manga_view"
+		SortOrder.UPDATED -> "manga_updated"
+		else -> "manga_view"
+	}
 }
\ No newline at end of file
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/RemangaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/RemangaParser.kt
index f81b093f..7dc191c4 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/RemangaParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/RemangaParser.kt
@@ -171,7 +171,7 @@ internal class RemangaParser(
 
 	override suspend fun getPages(chapter: MangaChapter): List<MangaPage> {
 		val referer = "https://${getDomain()}/"
-		val content = context.httpGet(chapter.url.toAbsoluteUrl(getDomain(), "api"), getApiHeaders())
+		val content = context.httpGet(chapter.url.toAbsoluteUrl(getDomain("api")), getApiHeaders())
 			.handle401()
 			.parseJson()
 			.getJSONObject("content")
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/util/Parse.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/util/Parse.kt
index 01cee9af..2bac7814 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/util/Parse.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/util/Parse.kt
@@ -8,11 +8,7 @@ import okhttp3.internal.closeQuietly
 import org.json.JSONArray
 import org.json.JSONObject
 import org.jsoup.Jsoup
-import org.jsoup.internal.StringUtil
 import org.jsoup.nodes.Document
-import org.jsoup.nodes.Element
-import org.jsoup.nodes.Node
-import org.jsoup.select.Elements
 import java.text.DateFormat
 
 /**
@@ -50,49 +46,6 @@ fun Response.parseJsonArray(): JSONArray = try {
 	closeQuietly()
 }
 
-@Deprecated(
-	message = "",
-	level = DeprecationLevel.ERROR,
-	replaceWith = ReplaceWith("firstNotNullOfOrNull { it.ownText().takeIf(predicate) }"),
-)
-inline fun Elements.findOwnText(predicate: (String) -> Boolean): String? {
-	for (x in this) {
-		val ownText = x.ownText()
-		if (predicate(ownText)) {
-			return ownText
-		}
-	}
-	return null
-}
-
-@Deprecated(
-	message = "",
-	level = DeprecationLevel.ERROR,
-	replaceWith = ReplaceWith("firstNotNullOfOrNull { it.text().takeIf(predicate) }"),
-)
-inline fun Elements.findText(predicate: (String) -> Boolean): String? {
-	for (x in this) {
-		val text = x.text()
-		if (predicate(text)) {
-			return text
-		}
-	}
-	return null
-}
-
-@Deprecated(
-	message = "Use toAbsoluteUrl() instead",
-	level = DeprecationLevel.ERROR,
-	replaceWith = ReplaceWith("toAbsoluteUrl(node.host)"),
-)
-fun String.inContextOf(node: Node): String {
-	return if (this.isEmpty()) {
-		""
-	} else {
-		StringUtil.resolve(node.baseUri(), this)
-	}
-}
-
 /**
  * Convert url to relative if it is on [domain]
  * @return an url relative to the [domain] or absolute, if domain is mismatching
@@ -114,41 +67,6 @@ fun String.toAbsoluteUrl(domain: String): String = when {
 	else -> this
 }
 
-/**
- * Convert url to absolute with specified domain and subdomain
- * @return an absolute url with [subdomain].[domain] if this is relative
- */
-fun String.toAbsoluteUrl(domain: String, subdomain: String): String {
-	if (!this.startsWith('/')) return this
-	return toAbsoluteUrl(subdomain + "." + domain.removePrefix("www."))
-}
-
-@Deprecated(
-	message = "",
-	level = DeprecationLevel.ERROR,
-	replaceWith = ReplaceWith("attrAsRelativeUrl(attributeKey)"),
-)
-fun Element.relUrl(attributeKey: String): String {
-	val attr = attr(attributeKey).trim()
-	if (attr.isEmpty()) {
-		return ""
-	}
-	if (attr.startsWith("/")) {
-		return attr
-	}
-	val baseUrl = REGEX_URL_BASE.find(baseUri())?.value ?: return attr
-	return attr.removePrefix(baseUrl.dropLast(1))
-}
-
-private val REGEX_URL_BASE = Regex("^[^/]{2,6}://[^/]+/", RegexOption.IGNORE_CASE)
-
-@Deprecated(
-	message = "",
-	level = DeprecationLevel.ERROR,
-	replaceWith = ReplaceWith("styleValueOrNull(property)"),
-)
-fun Element.css(property: String): String? = styleValueOrNull(property)
-
 fun DateFormat.tryParse(str: String?): Long = if (str.isNullOrEmpty()) {
 	0L
 } else {
diff --git a/src/test/kotlin/org/koitharu/kotatsu/parsers/MangaParserTest.kt b/src/test/kotlin/org/koitharu/kotatsu/parsers/MangaParserTest.kt
index 22255e80..e0ac6d02 100644
--- a/src/test/kotlin/org/koitharu/kotatsu/parsers/MangaParserTest.kt
+++ b/src/test/kotlin/org/koitharu/kotatsu/parsers/MangaParserTest.kt
@@ -135,7 +135,7 @@ internal class MangaParserTest {
 			.scheme("https")
 			.toString()
 		val response = context.doRequest(url)
-		val realDomain = response.request.url.host
+		val realDomain = response.request.url.topPrivateDomain()
 		assertEquals(defaultDomain, realDomain)
 	}