--- a/build/autoconf/android.m4
+++ b/build/autoconf/android.m4
@@ -6,7 +6,7 @@
 [
 
 case "$target" in
-*-android*|*-linuxandroid*)
+no-android)
     dnl $extra_android_flags will be set for us by Python configure.
     dnl $_topsrcdir/build/android is a hack for versions of rustc < 1.68
     LDFLAGS="$extra_android_flags -L$_topsrcdir/build/android $LDFLAGS"
--- a/build/moz.configure/init.configure
+++ b/build/moz.configure/init.configure
@@ -500,7 +500,7 @@
     abi = None
     sub_configure_alias = triplet
     if "android" in os:
-        canonical_os = "Android"
+        canonical_os = "GNU"
         canonical_kernel = "Linux"
     elif os.startswith("linux"):
         canonical_os = "GNU"
--- a/build/moz.configure/pkg.configure
+++ b/build/moz.configure/pkg.configure
@@ -56,7 +56,7 @@
 @imports(_from="os", _import="environ")
 @imports(_from="os", _import="pathsep")
 def pkg_config_vars(target, sysroot_path, multiarch_dir):
-    if sysroot_path and target.kernel != "Darwin":
+    if False:
         pkgconfig_dirs = [
             "usr/lib/pkgconfig",
             "usr/lib/{}/pkgconfig".format(multiarch_dir),
--- a/build/moz.configure/toolchain.configure
+++ b/build/moz.configure/toolchain.configure
@@ -1256,7 +1256,7 @@
     ):
         wrapper = list(compiler_wrapper or ())
         flags = []
-        if sysroot.path:
+        if False:
             if host_or_target.kernel == "Darwin":
                 # While --sysroot and -isysroot are roughly equivalent, when not using
                 # -isysroot on mac, clang takes the SDKROOT environment variable into
@@ -1981,17 +1981,7 @@
 
 @depends(cxx_compiler, target)
 def needs_libstdcxx_newness_check(cxx_compiler, target):
-    # We only have to care about this on Linux and MinGW.
-    if cxx_compiler.type == "clang-cl":
-        return
-
-    if target.kernel not in ("Linux", "WINNT"):
-        return
-
-    if target.os == "Android":
-        return
-
-    return True
+    return
 
 
 def die_on_old_libstdcxx():
--- a/dom/media/CubebUtils.cpp
+++ b/dom/media/CubebUtils.cpp
@@ -57,7 +57,7 @@
 #define PREF_AUDIOIPC_STACK_SIZE "media.audioipc.stack_size"
 #define PREF_AUDIOIPC_SHM_AREA_SIZE "media.audioipc.shm_area_size"
 
-#if (defined(XP_LINUX) && !defined(MOZ_WIDGET_ANDROID)) || \
+#if (defined(XP_LINUX) && !defined(__TERMUX__)) || \
     defined(XP_MACOSX) || defined(XP_WIN)
 #  define MOZ_CUBEB_REMOTING
 #endif
--- a/dom/media/moz.build
+++ b/dom/media/moz.build
@@ -321,7 +321,7 @@
     "XiphExtradata.cpp",
 ]
 
-if CONFIG["OS_TARGET"] == "Linux":
+if False:
     UNIFIED_SOURCES += ["UnderrunHandlerLinux.cpp"]
 else:
     UNIFIED_SOURCES += ["UnderrunHandlerNoop.cpp"]
--- a/dom/media/systemservices/VideoEngine.cpp
+++ b/dom/media/systemservices/VideoEngine.cpp
@@ -30,7 +30,7 @@
 #define LOG(args) MOZ_LOG(gVideoEngineLog, mozilla::LogLevel::Debug, args)
 #define LOG_ENABLED() MOZ_LOG_TEST(gVideoEngineLog, mozilla::LogLevel::Debug)
 
-#if defined(ANDROID)
+#if defined(ANDROID) && !defined(__TERMUX__)
 int VideoEngine::SetAndroidObjects() {
   LOG(("%s", __PRETTY_FUNCTION__));
 
--- a/ipc/chromium/src/base/lock_impl_posix.cc
+++ b/ipc/chromium/src/base/lock_impl_posix.cc
@@ -22,7 +22,7 @@
 // Lock::PriorityInheritanceAvailable still must be checked as the code may
 // compile but the underlying platform still may not correctly support priority
 // inheritance locks.
-#if defined(ANDROID)
+#if defined(ANDROID) || defined(__TERMUX__)
 #  define PRIORITY_INHERITANCE_LOCKS_POSSIBLE() 0
 #else
 #  define PRIORITY_INHERITANCE_LOCKS_POSSIBLE() 1
--- a/js/src/ctypes/libffi/src/closures.c
+++ b/js/src/ctypes/libffi/src/closures.c
@@ -112,7 +112,7 @@
 #else /* !NetBSD with PROT_MPROTECT */
 
 #if !FFI_MMAP_EXEC_WRIT && !FFI_EXEC_TRAMPOLINE_TABLE
-# if __linux__ && !defined(__ANDROID__)
+# if __linux__ && !defined(__TERMUX__)
 /* This macro indicates it may be forbidden to map anonymous memory
    with both write and execute permission.  Code compiled when this
    option is defined will attempt to map such pages once, but if it
--- a/memory/build/Mutex.h
+++ b/memory/build/Mutex.h
@@ -57,7 +57,7 @@
     }
 #elif defined(XP_DARWIN)
     mMutex = OS_UNFAIR_LOCK_INIT;
-#elif defined(XP_LINUX) && !defined(ANDROID)
+#elif defined(XP_LINUX) && !defined(__TERMUX__)
     pthread_mutexattr_t attr;
     if (pthread_mutexattr_init(&attr) != 0) {
       return false;
@@ -142,7 +142,7 @@
 
 #  if defined(XP_DARWIN)
 #    define STATIC_MUTEX_INIT OS_UNFAIR_LOCK_INIT
-#  elif defined(XP_LINUX) && !defined(ANDROID)
+#  elif defined(XP_LINUX) && !defined(__TERMUX__)
 #    define STATIC_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
 #  else
 #    define STATIC_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
--- a/memory/build/malloc_decls.h
+++ b/memory/build/malloc_decls.h
@@ -39,7 +39,7 @@
 // consistent declare certain functions as `throw()`, though.
 
 // Bionic and OS X don't seem to care about `throw()`ness.
-#  if defined(ANDROID) || defined(XP_DARWIN)
+#  if defined(__TERMUX__) || defined(XP_DARWIN)
 #    undef NOTHROW_MALLOC_DECL
 #    define NOTHROW_MALLOC_DECL MALLOC_DECL
 // Some places don't care about the distinction.
--- a/modules/zlib/src/gzguts.h
+++ b/modules/zlib/src/gzguts.h
@@ -3,6 +3,8 @@
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
+#include <unistd.h>
+
 #ifdef _LARGEFILE64_SOURCE
 #  ifndef _LARGEFILE_SOURCE
 #    define _LARGEFILE_SOURCE 1
--- a/mozglue/misc/ConditionVariable_posix.cpp
+++ b/mozglue/misc/ConditionVariable_posix.cpp
@@ -23,7 +23,7 @@
 // Android 4.4 or earlier & macOS 10.12 has the clock functions, but not
 // pthread_condattr_setclock.
 #if defined(HAVE_CLOCK_MONOTONIC) && \
-    !(defined(__ANDROID__) && __ANDROID_API__ < 21) && !defined(__APPLE__)
+    defined(__TERMUX__)
 #  define CV_USE_CLOCK_API
 #endif
 
--- a/mozglue/misc/StackWalk.cpp
+++ b/mozglue/misc/StackWalk.cpp
@@ -692,7 +692,7 @@
   stackEnd = __libc_stack_end;
 #    elif defined(XP_DARWIN)
   stackEnd = pthread_get_stackaddr_np(pthread_self());
-#    elif defined(ANDROID)
+#    elif defined(__TERMUX__)
   pthread_attr_t sattr;
   pthread_attr_init(&sattr);
   pthread_getattr_np(pthread_self(), &sattr);
--- a/nsprpub/pr/src/pthreads/ptsynch.c
+++ b/nsprpub/pr/src/pthreads/ptsynch.c
@@ -953,7 +953,7 @@
 #if (defined(__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)) \
     || (defined(FREEBSD) && __FreeBSD_version < 1200059) \
     || defined(OPENBSD) || defined(BSDI) \
-    || defined(DARWIN)
+    || defined(DARWIN) || defined(__TERMUX__)
 /* union semun is defined by including <sys/sem.h> */
 #else
 /* according to X/OPEN we have to define it ourselves */
--- a/nsprpub/pr/src/pthreads/ptthread.c
+++ b/nsprpub/pr/src/pthreads/ptthread.c
@@ -37,6 +37,10 @@
 #endif
 #endif
 
+#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING) && defined(__TERMUX__)
+#undef _POSIX_THREAD_PRIORITY_SCHEDULING
+#endif
+
 /*
  * Record whether or not we have the privilege to set the scheduling
  * policy and priority of threads.  0 means that privilege is available.
--- a/old-configure.in
+++ b/old-configure.in
@@ -197,9 +197,6 @@
     AC_MSG_CHECKING([for --noexecstack option to as])
     _SAVE_CFLAGS=$CFLAGS
     CFLAGS="$CFLAGS -Wa,--noexecstack"
-    AC_TRY_COMPILE(,,AC_MSG_RESULT([yes])
-                     [ASFLAGS="$ASFLAGS -Wa,--noexecstack"],
-                     AC_MSG_RESULT([no]))
     CFLAGS=$_SAVE_CFLAGS
     AC_MSG_CHECKING([for -z noexecstack option to ld])
     _SAVE_LDFLAGS=$LDFLAGS
--- a/toolkit/components/extensions/storage/moz.build
+++ b/toolkit/components/extensions/storage/moz.build
@@ -17,7 +17,7 @@
 # a delegate for consumers to use instead. Android Components can then provide
 # an implementation of the delegate that's backed by the Rust component. For
 # details, please see bug 1626506, comment 4.
-if CONFIG["MOZ_WIDGET_TOOLKIT"] != "android":
+if False:
     EXPORTS.mozilla.extensions.storage += [
         "ExtensionStorageComponents.h",
     ]
--- a/toolkit/library/rust/shared/Cargo.toml
+++ b/toolkit/library/rust/shared/Cargo.toml
@@ -104,7 +104,6 @@
 # Since we're building with at least rustc 1.63, enable rust 1.57 features (use of try_reserve methods).
 fallible_collections = { version = "0.4", features = ["rust_1_57"] }
 
-[target.'cfg(not(target_os = "android"))'.dependencies]
 viaduct = "0.1"
 webext_storage_bridge = { path = "../../../components/extensions/storage/webext_storage_bridge" }
 tabs = { version = "0.1" }
--- a/toolkit/library/rust/shared/lib.rs
+++ b/toolkit/library/rust/shared/lib.rs
@@ -50,21 +50,16 @@
 
 extern crate audio_thread_priority;
 
-#[cfg(not(target_os = "android"))]
 extern crate webext_storage_bridge;
 
-#[cfg(not(target_os = "android"))]
 extern crate tabs;
 
-#[cfg(not(target_os = "android"))]
 mod reexport_tabs {
     tabs::uniffi_reexport_scaffolding!();
 }
 
-#[cfg(not(target_os = "android"))]
 extern crate suggest;
 
-#[cfg(not(target_os = "android"))]
 mod reexport_suggest {
     suggest::uniffi_reexport_scaffolding!();
 }
@@ -93,7 +88,6 @@
 extern crate l10nregistry_ffi;
 extern crate localization_ffi;
 
-#[cfg(not(target_os = "android"))]
 extern crate viaduct;
 
 extern crate gecko_logger;
--- a/toolkit/moz.configure
+++ b/toolkit/moz.configure
@@ -174,7 +174,7 @@
 @depends(target)
 def midir_linux_support(target):
     return (
-        target.kernel == "Linux" and target.os != "Android" and target.cpu != "riscv64"
+        False
     )
 
 
@@ -234,7 +234,7 @@
 
 @depends("--enable-audio-backends", target)
 def imply_aaudio(values, target):
-    if any("aaudio" in value for value in values) and target.os != "Android":
+    if any("aaudio" in value for value in values) and False:
         die("Cannot enable AAudio on %s", target.os)
     return any("aaudio" in value for value in values) or None
 
@@ -268,7 +268,7 @@
 
 @depends("--enable-audio-backends", target)
 def imply_opensl(values, target):
-    if any("opensl" in value for value in values) and target.os != "Android":
+    if any("opensl" in value for value in values) and False:
         die("Cannot enable OpenSL on %s", target.os)
     return any("opensl" in value for value in values) or None
 
@@ -1523,6 +1523,7 @@
         # packed relative relocations rather than elfhack.
         if android_version:
             return android_version >= 30
+        return False
         return have_arc4random
 
     @depends(
@@ -2250,6 +2251,8 @@
         set_config("MOZ_JPEG_CFLAGS", jpeg_flags.cflags)
         set_config("MOZ_JPEG_LIBS", jpeg_flags.ldflags)
 
+        set_config("MOZ_SYSTEM_JPEG", True)
+
     @depends("--with-system-jpeg", target, neon_flags)
     def in_tree_jpeg_arm(system_jpeg, target, neon_flags):
         if system_jpeg:
@@ -3418,7 +3421,7 @@
     option(
         env="MOZ_LINKER",
         default=depends(target.os, when="--enable-jemalloc")(
-            lambda os: os == "Android"
+            lambda os: True
         ),
         help="{Enable|Disable} custom dynamic linker",
     )
@@ -3450,7 +3453,7 @@
         "Can't find header linux/joystick.h, needed for gamepad support."
         " Please install Linux kernel headers."
     ),
-    when=target_has_linux_kernel & compile_environment,
+    when=False,
 )
 
 
--- a/toolkit/xre/glxtest/glxtest.cpp
+++ b/toolkit/xre/glxtest/glxtest.cpp
@@ -946,7 +946,9 @@
   log("GLX_TEST: childgltest start\n");
 
   // Get a list of all GPUs from the PCI bus.
+#if !defined(__TERMUX__)
   get_pci_status();
+#endif
 
 #ifdef MOZ_WAYLAND
   if (aWayland) {