diff --git a/Cargo.toml b/Cargo.toml
index 44dba1782c15..e9bb960e12f7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -61,8 +61,8 @@ rust-version = "1.82.0"
 
 [workspace.dependencies]
 # Shared across multiple UniFFI consumers.
-uniffi = "0.28.2"
-uniffi_bindgen = "0.28.2"
+uniffi = "0.29.0"
+uniffi_bindgen = "0.29.0"
 # Shared across multiple application-services consumers.
 rusqlite = "0.31.0"
 # Shared across multiple glean consumers.
@@ -176,6 +176,9 @@ goblin = { path = "build/rust/goblin" }
 # Implement getrandom 0.2 in terms of 0.3
 getrandom = { path = "build/rust/getrandom" }
 
+# Patch rustc-hash 1.1.0 to 2.1.1
+rustc-hash = { path = "build/rust/rustc-hash" }
+
 # Patch memoffset from 0.8.0 to 0.9.0 since it's compatible and it avoids duplication
 memoffset = { path = "build/rust/memoffset" }
 
@@ -241,14 +244,14 @@ malloc_size_of_derive = { path = "xpcom/rust/malloc_size_of_derive" }
 objc = { git = "https://github.com/glandium/rust-objc", rev = "4de89f5aa9851ceca4d40e7ac1e2759410c04324" }
 
 # application-services overrides to make updating them all simpler.
-interrupt-support = { git = "https://github.com/mozilla/application-services", rev = "d773da92641d92930b7308300e9fc2746a05ce6a" }
-relevancy = { git = "https://github.com/mozilla/application-services", rev = "d773da92641d92930b7308300e9fc2746a05ce6a" }
-search = { git = "https://github.com/mozilla/application-services", rev = "d773da92641d92930b7308300e9fc2746a05ce6a" }
-sql-support = { git = "https://github.com/mozilla/application-services", rev = "d773da92641d92930b7308300e9fc2746a05ce6a" }
-suggest = { git = "https://github.com/mozilla/application-services", rev = "d773da92641d92930b7308300e9fc2746a05ce6a" }
-sync15 = { git = "https://github.com/mozilla/application-services", rev = "d773da92641d92930b7308300e9fc2746a05ce6a" }
-tabs = { git = "https://github.com/mozilla/application-services", rev = "d773da92641d92930b7308300e9fc2746a05ce6a" }
-viaduct = { git = "https://github.com/mozilla/application-services", rev = "d773da92641d92930b7308300e9fc2746a05ce6a" }
-webext-storage = { git = "https://github.com/mozilla/application-services", rev = "d773da92641d92930b7308300e9fc2746a05ce6a" }
+interrupt-support = { git = "https://github.com/mozilla/application-services", rev = "50c3f77fa264974678ec59e752fe7dc39c29900b" }
+relevancy = { git = "https://github.com/mozilla/application-services", rev = "50c3f77fa264974678ec59e752fe7dc39c29900b" }
+search = { git = "https://github.com/mozilla/application-services", rev = "50c3f77fa264974678ec59e752fe7dc39c29900b" }
+sql-support = { git = "https://github.com/mozilla/application-services", rev = "50c3f77fa264974678ec59e752fe7dc39c29900b" }
+suggest = { git = "https://github.com/mozilla/application-services", rev = "50c3f77fa264974678ec59e752fe7dc39c29900b" }
+sync15 = { git = "https://github.com/mozilla/application-services", rev = "50c3f77fa264974678ec59e752fe7dc39c29900b" }
+tabs = { git = "https://github.com/mozilla/application-services", rev = "50c3f77fa264974678ec59e752fe7dc39c29900b" }
+viaduct = { git = "https://github.com/mozilla/application-services", rev = "50c3f77fa264974678ec59e752fe7dc39c29900b" }
+webext-storage = { git = "https://github.com/mozilla/application-services", rev = "50c3f77fa264974678ec59e752fe7dc39c29900b" }
 
 allocator-api2 = { path = "third_party/rust/allocator-api2" }
diff --git a/build/rust/rustc-hash/Cargo.toml b/build/rust/rustc-hash/Cargo.toml
new file mode 100644
index 000000000000..977387a469fd
--- /dev/null
+++ b/build/rust/rustc-hash/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "rustc-hash"
+version = "1.999.999"
+edition = "2018"
+license = "Apache-2.0 OR MIT"
+
+[lib]
+path = "lib.rs"
+
+[dependencies.rustc-hash]
+version = "2.1.1"
+default-features = false
+
+[features]
+default = ["rustc-hash/default"]
+std = ["rustc-hash/std"]
+rand = ["rustc-hash/rand"]
diff --git a/build/rust/rustc-hash/lib.rs b/build/rust/rustc-hash/lib.rs
new file mode 100644
index 000000000000..dd0d3cd92fd7
--- /dev/null
+++ b/build/rust/rustc-hash/lib.rs
@@ -0,0 +1,11 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+pub use rustc_hash::*;
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/Cargo.toml b/toolkit/components/uniffi-bindgen-gecko-js/Cargo.toml
index 29e2e5ad6ac6..f617bcace37b 100644
--- a/toolkit/components/uniffi-bindgen-gecko-js/Cargo.toml
+++ b/toolkit/components/uniffi-bindgen-gecko-js/Cargo.toml
@@ -10,7 +10,7 @@ path = "src/main.rs"
 
 [dependencies]
 anyhow = "1"
-askama = { version = "0.12", default-features = false, features = ["config"] }
+rinja = { version = "0.3.4", default-features = false, features = ["config"] }
 clap = { version = "4", default-features = false, features = ["std", "derive", "cargo"] }
 cargo_metadata = "0.15"
 extend = "1.1"
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/fixtures/custom-types/src/lib.rs b/toolkit/components/uniffi-bindgen-gecko-js/fixtures/custom-types/src/lib.rs
index 61aea7a11ab3..b146bdd51c00 100644
--- a/toolkit/components/uniffi-bindgen-gecko-js/fixtures/custom-types/src/lib.rs
+++ b/toolkit/components/uniffi-bindgen-gecko-js/fixtures/custom-types/src/lib.rs
@@ -8,33 +8,17 @@ use url::Url;
 pub struct Handle(pub i64);
 
 // We must implement the UniffiCustomTypeConverter trait for each custom type on the scaffolding side
-impl UniffiCustomTypeConverter for Handle {
-    // The `Builtin` type will be used to marshall values across the FFI
-    type Builtin = i64;
-
-    // Convert Builtin to our custom type
-    fn into_custom(val: Self::Builtin) -> uniffi::Result<Self> {
-        Ok(Handle(val))
-    }
-
-    // Convert our custom type to Builtin
-    fn from_custom(obj: Self) -> Self::Builtin {
-        obj.0
-    }
-}
+uniffi::custom_type!(Handle, i64, {
+    try_lift: |val| Ok(Handle(val)),
+    lower: |obj| obj.0,
+});
 
 // Use `url::Url` as a custom type, with `String` as the Builtin
-impl UniffiCustomTypeConverter for Url {
-    type Builtin = String;
-
-    fn into_custom(val: Self::Builtin) -> uniffi::Result<Self> {
-        Ok(Url::parse(&val)?)
-    }
-
-    fn from_custom(obj: Self) -> Self::Builtin {
-        obj.to_string()
-    }
-}
+uniffi::custom_type!(Url, String, {
+    remote,
+    try_lift: |val| Ok(Url::parse(&val)?),
+    lower: |obj| obj.to_string(),
+});
 
 // And a little struct and function that ties them together.
 pub struct CustomTypesDemo {
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/askama.toml b/toolkit/components/uniffi-bindgen-gecko-js/rinja.toml
similarity index 100%
rename from toolkit/components/uniffi-bindgen-gecko-js/askama.toml
rename to toolkit/components/uniffi-bindgen-gecko-js/rinja.toml
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/src/docs.rs b/toolkit/components/uniffi-bindgen-gecko-js/src/docs.rs
index a2cc8721aa17..153409a461a0 100644
--- a/toolkit/components/uniffi-bindgen-gecko-js/src/docs.rs
+++ b/toolkit/components/uniffi-bindgen-gecko-js/src/docs.rs
@@ -5,8 +5,8 @@
 use std::fs;
 
 use anyhow::Context;
-use askama::Template;
 use camino::Utf8Path;
+use rinja::Template;
 use uniffi_bindgen::ComponentInterface;
 
 use crate::{render::js::*, Component, Result};
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/src/lib.rs b/toolkit/components/uniffi-bindgen-gecko-js/src/lib.rs
index a9f07ce53c8b..cef7646e9de9 100644
--- a/toolkit/components/uniffi-bindgen-gecko-js/src/lib.rs
+++ b/toolkit/components/uniffi-bindgen-gecko-js/src/lib.rs
@@ -3,9 +3,9 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use anyhow::{Context, Result};
-use askama::Template;
 use camino::{Utf8Path, Utf8PathBuf};
 use clap::Parser;
+use rinja::Template;
 use serde::{Deserialize, Serialize};
 use std::collections::HashSet;
 use std::fs::File;
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/src/render/cpp.rs b/toolkit/components/uniffi-bindgen-gecko-js/src/render/cpp.rs
index af78d2381fe6..2bc575ccfb0f 100644
--- a/toolkit/components/uniffi-bindgen-gecko-js/src/render/cpp.rs
+++ b/toolkit/components/uniffi-bindgen-gecko-js/src/render/cpp.rs
@@ -16,8 +16,8 @@ License, v. 2.0. If a copy of the MPL was not distributed with this
 
 use std::collections::HashSet;
 
-use askama::Template;
 use heck::{ToSnakeCase, ToUpperCamelCase};
+use rinja::Template;
 use uniffi_bindgen::interface::{
     AsType, Callable, CallbackInterface, ComponentInterface, FfiDefinition, FfiFunction, FfiType,
 };
@@ -416,8 +416,10 @@ fn scaffolding_converter(ci: &ComponentInterface, ffi_type: &FfiType) -> String
     match ffi_type {
         FfiType::RustArcPtr(name) => {
             // Check if this is an external type
-            for (extern_name, crate_name, _, _) in ci.iter_external_types() {
-                if extern_name == name {
+            for ty in ci.iter_external_types() {
+                let external_ty_name = ty.name().expect("External type without name");
+                let crate_name = ty.module_path().expect("External type without module path");
+                if external_ty_name == name {
                     return format!(
                         "ScaffoldingObjectConverter<&{}>",
                         pointer_type(crate_name_to_namespace(&crate_name), name),
@@ -461,7 +463,9 @@ fn cpp_type(ffi_type: &FfiType) -> String {
         FfiType::RustCallStatus => "RustCallStatus".to_owned(),
         FfiType::Callback(name) | FfiType::Struct(name) => name.to_owned(),
         FfiType::VoidPointer => "void*".to_owned(),
-        FfiType::Reference(inner) => format!("{}*", cpp_type(inner.as_ref())),
+        FfiType::MutReference(inner) | FfiType::Reference(inner) => {
+            format!("{}*", cpp_type(inner.as_ref()))
+        }
     }
 }
 
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/src/render/js.rs b/toolkit/components/uniffi-bindgen-gecko-js/src/render/js.rs
index faf5a897f44c..73aaf8dd3e8d 100644
--- a/toolkit/components/uniffi-bindgen-gecko-js/src/render/js.rs
+++ b/toolkit/components/uniffi-bindgen-gecko-js/src/render/js.rs
@@ -4,9 +4,9 @@ License, v. 2.0. If a copy of the MPL was not distributed with this
 
 use super::shared::*;
 use crate::{CallbackIds, Config, FunctionIds, ObjectIds};
-use askama::Template;
 use extend::ext;
 use heck::{ToLowerCamelCase, ToShoutySnakeCase, ToUpperCamelCase};
+use rinja::Template;
 use uniffi_bindgen::interface::{
     Argument, AsType, Callable, CallbackInterface, ComponentInterface, Constructor, Enum, Field,
     Function, Literal, Method, Object, Radix, Record, Type, Variant,
@@ -261,7 +261,6 @@ pub impl Type {
             | Type::Enum { name, .. }
             | Type::Record { name, .. }
             | Type::CallbackInterface { name, .. }
-            | Type::External { name, .. }
             | Type::Custom { name, .. } => name.to_upper_camel_case(),
             Type::Optional { inner_type } => format!("?{}", inner_type.type_name()),
             Type::Sequence { inner_type } => format!("Array.<{}>", inner_type.type_name()),
@@ -302,7 +301,7 @@ pub impl Type {
                 key_type.canonical_name().to_upper_camel_case(),
                 value_type.canonical_name().to_upper_camel_case()
             ),
-            Type::External { name, .. } | Type::Custom { name, .. } => format!("Type{name}"),
+            Type::Custom { name, .. } => format!("Type{name}"),
         }
     }
 
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Record.sys.mjs b/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Record.sys.mjs
index 40e46cc85b8b..df0c3044dcfb 100644
--- a/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Record.sys.mjs
+++ b/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Record.sys.mjs
@@ -22,7 +22,7 @@ export class {{ record.js_name() }} {
     equals(other) {
         return (
             {%- for field in record.fields() %}
-            {{ field.as_type().equals("this.{}"|format(field.js_name()), "other.{}"|format(field.js_name())) }}{% if !loop.last %} &&{% endif %}
+            {{ field.as_type().equals(&("this.{}"|format(field.js_name())), &("other.{}"|format(field.js_name()))) }}{% if !loop.last %} &&{% endif %}
             {%- endfor %}
         )
     }
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Types.sys.mjs b/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Types.sys.mjs
index 0a447296f7f8..1ab390e76974 100644
--- a/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Types.sys.mjs
+++ b/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Types.sys.mjs
@@ -3,7 +3,8 @@
 
 {% endif %}
 
-{%- for type_ in ci.iter_types() %}
+
+{%- for type_ in ci.iter_local_types() %}
 {%- let ffi_converter = type_.ffi_converter() %}
 {%- match type_ %}
 
@@ -75,9 +76,6 @@
 {%- when Type::Custom { name, builtin, module_path } %}
 {%- include "CustomType.sys.mjs" %}
 
-{%- when Type::External { name, module_path, kind, namespace, tagged } %}
-{%- include "ExternalType.sys.mjs" %}
-
 {%- when Type::CallbackInterface { name, module_path } %}
 {%- include "CallbackInterface.sys.mjs" %}
 
@@ -88,6 +86,14 @@
 
 {% endfor %}
 
+{%- for type_ in ci.iter_external_types() %}
+{%- let ffi_converter = type_.ffi_converter() %}
+{%- let name = type_.name().expect("External type without name") %}
+{%- let module_path = type_.module_path().expect("External type without module path") %}
+{%- include "ExternalType.sys.mjs" %}
+{%- endfor %}
+
+
 {%- if !ci.callback_interface_definitions().is_empty() %}
 // Define callback interface handlers, this must come after the type loop since they reference the FfiConverters defined above.
 
diff --git a/tools/lint/test-manifest-toml.yml b/tools/lint/test-manifest-toml.yml
index 9f3eb882ca43..fde20732a757 100644
--- a/tools/lint/test-manifest-toml.yml
+++ b/tools/lint/test-manifest-toml.yml
@@ -13,6 +13,7 @@ test-manifest-toml:
         - 'testing/mozbase/manifestparser/tests/'
         - 'testing/raptor/raptor/tests/'
         - 'third_party/rust/'
+        - 'toolkit/components/uniffi-bindgen-gecko-js/rinja.toml'
         - '**/.*ruff.toml'
         - '**/Cargo.toml'
         - '**/Cross.toml'