diff --git a/app.go b/app.go
index 60286cfc..14eeb6f0 100644
--- a/app.go
+++ b/app.go
@@ -163,12 +163,6 @@ type Config struct {
 	// Default: false
 	UnescapePath bool `json:"unescape_path"`
 
-	// Enable or disable ETag header generation, since both weak and strong etags are generated
-	// using the same hashing method (CRC-32). Weak ETags are the default when enabled.
-	//
-	// Default: false
-	ETag bool `json:"etag"`
-
 	// Max body size that the server accepts.
 	// -1 will decline any body size
 	//
@@ -475,12 +469,6 @@ func New(config ...Config) *App {
 		app.config = config[0]
 	}
 
-	if app.config.ETag {
-		if !IsChild() {
-			fmt.Println("[Warning] Config.ETag is deprecated since v2.0.6, please use 'middleware/etag'.")
-		}
-	}
-
 	// Override default values
 	if app.config.BodyLimit == 0 {
 		app.config.BodyLimit = DefaultBodyLimit
diff --git a/app_test.go b/app_test.go
index ee58df4b..d942277f 100644
--- a/app_test.go
+++ b/app_test.go
@@ -1256,30 +1256,6 @@ func Benchmark_AcquireCtx(b *testing.B) {
 	}
 }
 
-// go test -v -run=^$ -bench=Benchmark_App_ETag -benchmem -count=4
-func Benchmark_App_ETag(b *testing.B) {
-	app := New()
-	c := app.AcquireCtx(&fasthttp.RequestCtx{})
-	defer app.ReleaseCtx(c)
-	c.Send([]byte("Hello, World!"))
-	for n := 0; n < b.N; n++ {
-		setETag(c, false)
-	}
-	utils.AssertEqual(b, `"13-1831710635"`, string(c.Response().Header.Peek(HeaderETag)))
-}
-
-// go test -v -run=^$ -bench=Benchmark_App_ETag_Weak -benchmem -count=4
-func Benchmark_App_ETag_Weak(b *testing.B) {
-	app := New()
-	c := app.AcquireCtx(&fasthttp.RequestCtx{})
-	defer app.ReleaseCtx(c)
-	c.Send([]byte("Hello, World!"))
-	for n := 0; n < b.N; n++ {
-		setETag(c, true)
-	}
-	utils.AssertEqual(b, `W/"13-1831710635"`, string(c.Response().Header.Peek(HeaderETag)))
-}
-
 // go test -run Test_NewError
 func Test_NewError(t *testing.T) {
 	err := NewError(StatusForbidden, "permission denied")
diff --git a/helpers.go b/helpers.go
index e9c27d0a..e4bc0474 100644
--- a/helpers.go
+++ b/helpers.go
@@ -7,8 +7,6 @@ package fiber
 import (
 	"bytes"
 	"crypto/tls"
-	"fmt"
-	"hash/crc32"
 	"io"
 	"log"
 	"net"
@@ -175,52 +173,6 @@ func defaultString(value string, defaultValue []string) string {
 
 const normalizedHeaderETag = "Etag"
 
-// Generate and set ETag header to response
-func setETag(c *Ctx, weak bool) {
-	// Don't generate ETags for invalid responses
-	if c.fasthttp.Response.StatusCode() != StatusOK {
-		return
-	}
-	body := c.fasthttp.Response.Body()
-	// Skips ETag if no response body is present
-	if len(body) == 0 {
-		return
-	}
-	// Get ETag header from request
-	clientEtag := c.Get(HeaderIfNoneMatch)
-
-	// Generate ETag for response
-	crc32q := crc32.MakeTable(0xD5828281)
-	etag := fmt.Sprintf("\"%d-%v\"", len(body), crc32.Checksum(body, crc32q))
-
-	// Enable weak tag
-	if weak {
-		etag = "W/" + etag
-	}
-
-	// Check if client's ETag is weak
-	if strings.HasPrefix(clientEtag, "W/") {
-		// Check if server's ETag is weak
-		if clientEtag[2:] == etag || clientEtag[2:] == etag[2:] {
-			// W/1 == 1 || W/1 == W/1
-			_ = c.SendStatus(StatusNotModified)
-			c.fasthttp.ResetBody()
-			return
-		}
-		// W/1 != W/2 || W/1 != 2
-		c.setCanonical(normalizedHeaderETag, etag)
-		return
-	}
-	if strings.Contains(clientEtag, etag) {
-		// 1 == 1
-		_ = c.SendStatus(StatusNotModified)
-		c.fasthttp.ResetBody()
-		return
-	}
-	// 1 != 2
-	c.setCanonical(normalizedHeaderETag, etag)
-}
-
 func getGroupPath(prefix, path string) string {
 	if len(path) == 0 || path == "/" {
 		return prefix
@@ -624,8 +576,6 @@ const (
 	HeaderContentSecurityPolicyReportOnly = "Content-Security-Policy-Report-Only"
 	HeaderCrossOriginResourcePolicy       = "Cross-Origin-Resource-Policy"
 	HeaderExpectCT                        = "Expect-CT"
-	// Deprecated: use HeaderPermissionsPolicy instead
-	HeaderFeaturePolicy           = "Feature-Policy"
 	HeaderPermissionsPolicy       = "Permissions-Policy"
 	HeaderPublicKeyPins           = "Public-Key-Pins"
 	HeaderPublicKeyPinsReportOnly = "Public-Key-Pins-Report-Only"
diff --git a/helpers_test.go b/helpers_test.go
index 1fe408e1..4bca073c 100644
--- a/helpers_test.go
+++ b/helpers_test.go
@@ -16,89 +16,6 @@ import (
 	"github.com/valyala/fasthttp"
 )
 
-// go test -v -run=Test_Utils_ -count=3
-func Test_Utils_ETag(t *testing.T) {
-	app := New()
-	t.Run("Not Status OK", func(t *testing.T) {
-		c := app.AcquireCtx(&fasthttp.RequestCtx{})
-		defer app.ReleaseCtx(c)
-		c.SendString("Hello, World!")
-		c.Status(201)
-		setETag(c, false)
-		utils.AssertEqual(t, "", string(c.Response().Header.Peek(HeaderETag)))
-	})
-
-	t.Run("No Body", func(t *testing.T) {
-		c := app.AcquireCtx(&fasthttp.RequestCtx{})
-		defer app.ReleaseCtx(c)
-		setETag(c, false)
-		utils.AssertEqual(t, "", string(c.Response().Header.Peek(HeaderETag)))
-	})
-
-	t.Run("Has HeaderIfNoneMatch", func(t *testing.T) {
-		c := app.AcquireCtx(&fasthttp.RequestCtx{})
-		defer app.ReleaseCtx(c)
-		c.SendString("Hello, World!")
-		c.Request().Header.Set(HeaderIfNoneMatch, `"13-1831710635"`)
-		setETag(c, false)
-		utils.AssertEqual(t, 304, c.Response().StatusCode())
-		utils.AssertEqual(t, "", string(c.Response().Header.Peek(HeaderETag)))
-		utils.AssertEqual(t, "", string(c.Response().Body()))
-	})
-
-	t.Run("No HeaderIfNoneMatch", func(t *testing.T) {
-		c := app.AcquireCtx(&fasthttp.RequestCtx{})
-		defer app.ReleaseCtx(c)
-		c.SendString("Hello, World!")
-		setETag(c, false)
-		utils.AssertEqual(t, `"13-1831710635"`, string(c.Response().Header.Peek(HeaderETag)))
-	})
-}
-
-// go test -v -run=^$ -bench=Benchmark_App_ETag -benchmem -count=4
-func Benchmark_Utils_ETag(b *testing.B) {
-	app := New()
-	c := app.AcquireCtx(&fasthttp.RequestCtx{})
-	defer app.ReleaseCtx(c)
-	c.SendString("Hello, World!")
-	for n := 0; n < b.N; n++ {
-		setETag(c, false)
-	}
-	utils.AssertEqual(b, `"13-1831710635"`, string(c.Response().Header.Peek(HeaderETag)))
-}
-
-// go test -v -run=Test_Utils_ETag_Weak -count=1
-func Test_Utils_ETag_Weak(t *testing.T) {
-	app := New()
-	t.Run("Set Weak", func(t *testing.T) {
-		c := app.AcquireCtx(&fasthttp.RequestCtx{})
-		defer app.ReleaseCtx(c)
-		c.SendString("Hello, World!")
-		setETag(c, true)
-		utils.AssertEqual(t, `W/"13-1831710635"`, string(c.Response().Header.Peek(HeaderETag)))
-	})
-
-	t.Run("Match Weak ETag", func(t *testing.T) {
-		c := app.AcquireCtx(&fasthttp.RequestCtx{})
-		defer app.ReleaseCtx(c)
-		c.SendString("Hello, World!")
-		c.Request().Header.Set(HeaderIfNoneMatch, `W/"13-1831710635"`)
-		setETag(c, true)
-		utils.AssertEqual(t, 304, c.Response().StatusCode())
-		utils.AssertEqual(t, "", string(c.Response().Header.Peek(HeaderETag)))
-		utils.AssertEqual(t, "", string(c.Response().Body()))
-	})
-
-	t.Run("Not Match Weak ETag", func(t *testing.T) {
-		c := app.AcquireCtx(&fasthttp.RequestCtx{})
-		defer app.ReleaseCtx(c)
-		c.SendString("Hello, World!")
-		c.Request().Header.Set(HeaderIfNoneMatch, `W/"13-1831710635xx"`)
-		setETag(c, true)
-		utils.AssertEqual(t, `W/"13-1831710635"`, string(c.Response().Header.Peek(HeaderETag)))
-	})
-}
-
 func Test_Utils_UniqueRouteStack(t *testing.T) {
 	route1 := &Route{}
 	route2 := &Route{}
@@ -127,18 +44,6 @@ func Test_Utils_UniqueRouteStack(t *testing.T) {
 	)
 }
 
-// go test -v -run=^$ -bench=Benchmark_App_ETag_Weak -benchmem -count=4
-func Benchmark_Utils_ETag_Weak(b *testing.B) {
-	app := New()
-	c := app.AcquireCtx(&fasthttp.RequestCtx{})
-	defer app.ReleaseCtx(c)
-	c.SendString("Hello, World!")
-	for n := 0; n < b.N; n++ {
-		setETag(c, true)
-	}
-	utils.AssertEqual(b, `W/"13-1831710635"`, string(c.Response().Header.Peek(HeaderETag)))
-}
-
 func Test_Utils_getGroupPath(t *testing.T) {
 	t.Parallel()
 	res := getGroupPath("/v1", "/")
diff --git a/middleware/cache/config.go b/middleware/cache/config.go
index 10739a13..107e1d77 100644
--- a/middleware/cache/config.go
+++ b/middleware/cache/config.go
@@ -1,7 +1,6 @@
 package cache
 
 import (
-	"fmt"
 	"time"
 
 	"github.com/gofiber/fiber/v3"
@@ -49,12 +48,6 @@ type Config struct {
 	// Default: an in memory store for this process only
 	Storage fiber.Storage
 
-	// Deprecated, use Storage instead
-	Store fiber.Storage
-
-	// Deprecated, use KeyGenerator instead
-	Key func(*fiber.Ctx) string
-
 	// allows you to store additional headers generated by next middlewares & handler
 	//
 	// Default: false
@@ -94,14 +87,6 @@ func configDefault(config ...Config) Config {
 	cfg := config[0]
 
 	// Set default values
-	if cfg.Store != nil {
-		fmt.Println("[CACHE] Store is deprecated, please use Storage")
-		cfg.Storage = cfg.Store
-	}
-	if cfg.Key != nil {
-		fmt.Println("[CACHE] Key is deprecated, please use KeyGenerator")
-		cfg.KeyGenerator = cfg.Key
-	}
 	if cfg.Next == nil {
 		cfg.Next = ConfigDefault.Next
 	}
diff --git a/middleware/csrf/config.go b/middleware/csrf/config.go
index 9422b787..f00024fb 100644
--- a/middleware/csrf/config.go
+++ b/middleware/csrf/config.go
@@ -1,7 +1,6 @@
 package csrf
 
 import (
-	"fmt"
 	"net/textproto"
 	"strings"
 	"time"
@@ -78,15 +77,6 @@ type Config struct {
 	// Optional. Default: utils.UUID
 	KeyGenerator func() string
 
-	// Deprecated, please use Expiration
-	CookieExpires time.Duration
-
-	// Deprecated, please use Cookie* related fields
-	Cookie *fiber.Cookie
-
-	// Deprecated, please use KeyLookup
-	TokenLookup string
-
 	// ErrorHandler is executed when an error is returned from fiber.Handler.
 	//
 	// Optional. Default: DefaultErrorHandler
@@ -123,31 +113,6 @@ func configDefault(config ...Config) Config {
 	cfg := config[0]
 
 	// Set default values
-	if cfg.TokenLookup != "" {
-		fmt.Println("[CSRF] TokenLookup is deprecated, please use KeyLookup")
-		cfg.KeyLookup = cfg.TokenLookup
-	}
-	if int(cfg.CookieExpires.Seconds()) > 0 {
-		fmt.Println("[CSRF] CookieExpires is deprecated, please use Expiration")
-		cfg.Expiration = cfg.CookieExpires
-	}
-	if cfg.Cookie != nil {
-		fmt.Println("[CSRF] Cookie is deprecated, please use Cookie* related fields")
-		if cfg.Cookie.Name != "" {
-			cfg.CookieName = cfg.Cookie.Name
-		}
-		if cfg.Cookie.Domain != "" {
-			cfg.CookieDomain = cfg.Cookie.Domain
-		}
-		if cfg.Cookie.Path != "" {
-			cfg.CookiePath = cfg.Cookie.Path
-		}
-		cfg.CookieSecure = cfg.Cookie.Secure
-		cfg.CookieHTTPOnly = cfg.Cookie.HTTPOnly
-		if cfg.Cookie.SameSite != "" {
-			cfg.CookieSameSite = cfg.Cookie.SameSite
-		}
-	}
 	if cfg.KeyLookup == "" {
 		cfg.KeyLookup = ConfigDefault.KeyLookup
 	}
diff --git a/middleware/limiter/config.go b/middleware/limiter/config.go
index f94ce3c4..09968911 100644
--- a/middleware/limiter/config.go
+++ b/middleware/limiter/config.go
@@ -1,7 +1,6 @@
 package limiter
 
 import (
-	"fmt"
 	"time"
 
 	"github.com/gofiber/fiber/v3"
@@ -57,15 +56,6 @@ type Config struct {
 	//
 	// Default: a new Fixed Window Rate Limiter
 	LimiterMiddleware LimiterHandler
-
-	// DEPRECATED: Use Expiration instead
-	Duration time.Duration
-
-	// DEPRECATED, use Storage instead
-	Store fiber.Storage
-
-	// DEPRECATED, use KeyGenerator instead
-	Key func(*fiber.Ctx) string
 }
 
 // ConfigDefault is the default config
@@ -94,18 +84,6 @@ func configDefault(config ...Config) Config {
 	cfg := config[0]
 
 	// Set default values
-	if int(cfg.Duration.Seconds()) > 0 {
-		fmt.Println("[LIMITER] Duration is deprecated, please use Expiration")
-		cfg.Expiration = cfg.Duration
-	}
-	if cfg.Key != nil {
-		fmt.Println("[LIMITER] Key is deprecated, please us KeyGenerator")
-		cfg.KeyGenerator = cfg.Key
-	}
-	if cfg.Store != nil {
-		fmt.Println("[LIMITER] Store is deprecated, please use Storage")
-		cfg.Storage = cfg.Store
-	}
 	if cfg.Next == nil {
 		cfg.Next = ConfigDefault.Next
 	}
diff --git a/middleware/logger/logger.go b/middleware/logger/logger.go
index 48267967..53ba934a 100644
--- a/middleware/logger/logger.go
+++ b/middleware/logger/logger.go
@@ -42,8 +42,6 @@ const (
 	TagBytesReceived     = "bytesReceived"
 	TagRoute             = "route"
 	TagError             = "error"
-	// DEPRECATED: Use TagReqHeader instead
-	TagHeader     = "header:"
 	TagReqHeader  = "reqHeader:"
 	TagRespHeader = "respHeader:"
 	TagLocals     = "locals:"
@@ -286,8 +284,6 @@ func New(config ...Config) fiber.Handler {
 				switch {
 				case strings.HasPrefix(tag, TagReqHeader):
 					return buf.WriteString(c.Get(tag[10:]))
-				case strings.HasPrefix(tag, TagHeader):
-					return buf.WriteString(c.Get(tag[7:]))
 				case strings.HasPrefix(tag, TagRespHeader):
 					return buf.WriteString(c.GetRespHeader(tag[11:]))
 				case strings.HasPrefix(tag, TagQuery):
diff --git a/middleware/proxy/proxy.go b/middleware/proxy/proxy.go
index b28104db..e5ab9805 100644
--- a/middleware/proxy/proxy.go
+++ b/middleware/proxy/proxy.go
@@ -3,7 +3,6 @@ package proxy
 import (
 	"bytes"
 	"crypto/tls"
-	"fmt"
 	"net/url"
 	"strings"
 
@@ -12,12 +11,6 @@ import (
 	"github.com/valyala/fasthttp"
 )
 
-// New is deprecated
-func New(config Config) fiber.Handler {
-	fmt.Println("proxy.New is deprecated, please use proxy.Balancer instead")
-	return Balancer(config)
-}
-
 // Balancer creates a load balancer among multiple upstream servers
 func Balancer(config Config) fiber.Handler {
 	// Set default config
diff --git a/middleware/session/config.go b/middleware/session/config.go
index 3abf807b..6e68df13 100644
--- a/middleware/session/config.go
+++ b/middleware/session/config.go
@@ -1,7 +1,6 @@
 package session
 
 import (
-	"fmt"
 	"strings"
 	"time"
 
@@ -49,9 +48,6 @@ type Config struct {
 	// Optional. Default value utils.UUIDv4
 	KeyGenerator func() string
 
-	// Deprecated, please use KeyLookup
-	CookieName string
-
 	// Source defines where to obtain the session id
 	source Source
 
@@ -90,10 +86,6 @@ func configDefault(config ...Config) Config {
 	if int(cfg.Expiration.Seconds()) <= 0 {
 		cfg.Expiration = ConfigDefault.Expiration
 	}
-	if cfg.CookieName != "" {
-		fmt.Println("[session] CookieName is deprecated, please use KeyLookup")
-		cfg.KeyLookup = fmt.Sprintf("cookie:%s", cfg.CookieName)
-	}
 	if cfg.KeyLookup == "" {
 		cfg.KeyLookup = ConfigDefault.KeyLookup
 	}
diff --git a/router.go b/router.go
index dd9042ca..6c7b4e68 100644
--- a/router.go
+++ b/router.go
@@ -18,7 +18,7 @@ import (
 
 // Router defines all router handle interface includes app and group router.
 type Router interface {
-	Use(args ...any) Router
+	Use(args ...interface{}) Router
 
 	Get(path string, handlers ...Handler) Router
 	Head(path string, handlers ...Handler) Router
@@ -156,16 +156,12 @@ func (app *App) handler(rctx *fasthttp.RequestCtx) {
 	}
 
 	// Find match in stack
-	match, err := app.next(c)
+	_, err := app.next(c)
 	if err != nil {
 		if catch := c.app.ErrorHandler(c, err); catch != nil {
 			_ = c.SendStatus(StatusInternalServerError)
 		}
 	}
-	// Generate ETag if enabled
-	if match && app.config.ETag {
-		setETag(c, false)
-	}
 
 	// Release Ctx
 	app.ReleaseCtx(c)
diff --git a/router_test.go b/router_test.go
index 3aadcdb1..49834966 100644
--- a/router_test.go
+++ b/router_test.go
@@ -292,21 +292,6 @@ func Test_Ensure_Router_Interface_Implementation(t *testing.T) {
 	utils.AssertEqual(t, true, ok)
 }
 
-func Test_Router_Handler_SetETag(t *testing.T) {
-	app := New()
-	app.config.ETag = true
-
-	app.Get("/", func(c *Ctx) error {
-		return c.SendString("Hello, World!")
-	})
-
-	c := &fasthttp.RequestCtx{}
-
-	app.Handler()(c)
-
-	utils.AssertEqual(t, `"13-1831710635"`, string(c.Response.Header.Peek(HeaderETag)))
-}
-
 func Test_Router_Handler_Catch_Error(t *testing.T) {
 	app := New()
 	app.config.ErrorHandler = func(ctx *Ctx, err error) error {
diff --git a/utils/deprecated.go b/utils/deprecated.go
deleted file mode 100644
index ae6fd34e..00000000
--- a/utils/deprecated.go
+++ /dev/null
@@ -1,18 +0,0 @@
-package utils
-
-// #nosec G103
-// DEPRECATED, Please use UnsafeString instead
-func GetString(b []byte) string {
-	return UnsafeString(b)
-}
-
-// #nosec G103
-// DEPRECATED, Please use UnsafeBytes instead
-func GetBytes(s string) []byte {
-	return UnsafeBytes(s)
-}
-
-// DEPRECATED, Please use CopyString instead
-func ImmutableString(s string) string {
-	return CopyString(s)
-}