diff --git a/bash/.profile b/bash/.profile
index c85e0e3..1c0d8a7 100644
--- a/bash/.profile
+++ b/bash/.profile
@@ -1,37 +1,50 @@
-# set PATH so it includes user's private bin if it exists
-if [ -d "$HOME/bin" ]; then
-    PATH="$HOME/bin:$PATH"
+if [ -z "$PROFILE_LOCK" ]; then
+    export PROFILE_LOCK=1
+
+    # set PATH so it includes user's private bin if it exists
+    if [ -d "$HOME/bin" ]; then
+        PATH="$HOME/bin:$PATH"
+    fi
+
+    # config
+    if [ -z "$XDG_DATA_HOME" ]; then
+        export XDG_DATA_HOME="$HOME/.local/share"
+        mkdir -p "$XDG_DATA_HOME"
+    fi
+    if [ -z "$XDG_CONFIG_HOME" ]; then
+        export XDG_CONFIG_HOME="$HOME/.config"
+        mkdir -p "$XDG_CONFIG_HOME"
+    fi
+
+    # workspace
+    if [ -z "$WORKSPACE" ]; then
+        export WORKSPACE="$HOME/workspace"
+    fi
+
+    # .local
+    export PATH="$HOME/.local/bin:$PATH"
+
+    # pyenv
+    export PYENV_ROOT="$HOME/.pyenv"
+    export PATH="$PYENV_ROOT/bin:$PATH"
+    export PATH="$PYENV_ROOT/shims:$PATH"
+    [ -x "$(command -v pyenv)" ] && eval "$(pyenv init -)"
+
+    # poetry
+    export POETRY_ROOT="$HOME/.poetry"
+    export PATH="$POETRY_ROOT/bin:$PATH"
+
+    # nvm
+    export NVM_DIR="$XDG_CONFIG_HOME/nvm"
+    export PATH="$NVM_DIR/bin:$PATH"
+    # [ -s "$NVM_DIR/nvm.sh" ] && source "$NVM_DIR/nvm.sh"
+
+    # yarn
+    export YARN_DIR="$HOME/.yarn"
+    if ! [ -x "$(command -v yarn)" ]; then
+        export PATH="$YARN_DIR/bin:$PATH"
+    else
+        export PATH="$(yarn global bin):$PATH"
+    fi
+
 fi
-
-# config
-if [ -z "$XDG_DATA_HOME" ]; then
-    export XDG_DATA_HOME="$HOME/.local/share"
-    mkdir -p "$XDG_DATA_HOME"
-fi
-if [ -z "$XDG_CONFIG_HOME" ]; then
-    export XDG_CONFIG_HOME="$HOME/.config"
-    mkdir -p "$XDG_CONFIG_HOME"
-fi
-
-# workspace
-if [ -z "$WORKSPACE" ]; then
-    export WORKSPACE="$HOME/workspace"
-fi
-
-# .local
-export PATH="$HOME/.local/bin:$PATH"
-
-# pyenv
-export PYENV_ROOT="$HOME/.pyenv"
-export PATH="$PYENV_ROOT/bin:$PATH"
-export PATH="$PYENV_ROOT/shims:$PATH"
-[ -x "$(command -v pyenv)" ] && eval "$(pyenv init -)"
-
-# poetry
-export POETRY_ROOT="$HOME/.poetry"
-export PATH="$POETRY_ROOT/bin:$PATH"
-
-# nvm
-export NVM_DIR="$XDG_CONFIG_HOME/nvm"
-export PATH="$NVM_DIR/bin:$PATH"
-[ -s "$NVM_DIR/nvm.sh" ] && source "$NVM_DIR/nvm.sh"
diff --git a/fish/config.fish b/fish/config.fish
index 85f4204..8565fd7 100644
--- a/fish/config.fish
+++ b/fish/config.fish
@@ -22,8 +22,12 @@ set POETRY_ROOT $HOME/.poetry
 set -x PATH $POETRY_ROOT/bin $PATH
 
 # nvm
-# set NVM_ROOT $HOME/.nvm
-# set -x PATH $NVM_ROOT/bin $PATH
+set NVM_ROOT $HOME/.nvm
+set -x PATH $NVM_ROOT/bin $PATH
+
+# yarn
+set YARN_DIR $HOME/.yarn
+set -x PATH $YARN_DIR/bin $PATH
 
 # ---------------------------------------------------------------------------- #
 #   Fish specific
diff --git a/install/00-apt-pkglist b/install/00-apt-pkglist
index 6f9a05c..2cf1ad2 100644
--- a/install/00-apt-pkglist
+++ b/install/00-apt-pkglist
@@ -3,5 +3,4 @@ make
 net-tools
 openssh-client
 openssh-server
-screenfetch
 software-properties-common
diff --git a/install/03-ssh.sh b/install/03-ssh.sh
index fe7bfe0..3a6a0f9 100755
--- a/install/03-ssh.sh
+++ b/install/03-ssh.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# 1. ssh key exists
+# ssh key exists
 ssh_target="$HOME/.ssh"
 ssh_key="$ssh_target/id_rsa"
 ssh_pub="$ssh_key.pub"
@@ -10,7 +10,7 @@ if [ ! -f "$ssh_key" ]; then
 fi
 echo "ssh key exists"
 
-# 2. ssh dotfiles are symlinked
+# ssh dotfiles are symlinked
 ssh_source="$dotfiles_dir/ssh"
 link_folder "$ssh_source" "$ssh_target"
 echo "ssh dotfiles are symlinked"
diff --git a/install/04-git.sh b/install/04-git.sh
index 7922b35..9b7c7a7 100755
--- a/install/04-git.sh
+++ b/install/04-git.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# 1. git dotfiles are symlinked
+# git dotfiles are symlinked
 git_source="$dotfiles_dir/git"
 git_target="$HOME"
 link_folder "$git_source" "$git_target"
diff --git a/install/10-pyenv.sh b/install/10-pyenv.sh
index 3c1b7a6..2aee2bd 100755
--- a/install/10-pyenv.sh
+++ b/install/10-pyenv.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# 1. pyenv is installed
+# pyenv is installed
 if not_installed "pyenv"; then
 
     echo "Installing pyenv..."
diff --git a/install/11-python.sh b/install/11-python.sh
index 783c62f..cd77f6b 100755
--- a/install/11-python.sh
+++ b/install/11-python.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# 1. python3 and pip3 are installed
+# python3 and pip3 are installed
 if not_installed "pip3"; then
 
     echo "Installing python3 and pip3..."
diff --git a/install/12-poetry.sh b/install/12-poetry.sh
index 6a0e632..d8e11ab 100755
--- a/install/12-poetry.sh
+++ b/install/12-poetry.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# 1. poetry is installed
+# poetry is installed
 if not_installed "poetry"; then
 
     printf "Installing poetry...\n"
diff --git a/install/20-nvm.sh b/install/13-nvm.sh
similarity index 94%
rename from install/20-nvm.sh
rename to install/13-nvm.sh
index 459c2e2..2791491 100755
--- a/install/20-nvm.sh
+++ b/install/13-nvm.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# 1. nvm is installed
+# nvm is installed
 if not_installed "nvm"; then
 
     printf "Installing nvm...\n"
diff --git a/install/21-yarn.sh b/install/14-yarn.sh
similarity index 100%
rename from install/21-yarn.sh
rename to install/14-yarn.sh
diff --git a/install/15-java.sh b/install/15-java.sh
new file mode 100755
index 0000000..38e1b5e
--- /dev/null
+++ b/install/15-java.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+if not_installed "java"; then
+    echo "Installing java..."
+    install default-jre
+fi
+
+echo "java is installed"
+java --version
diff --git a/install/30-docker.sh b/install/30-docker.sh
index dbe780a..3d9fcfa 100755
--- a/install/30-docker.sh
+++ b/install/30-docker.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# 1. docker is installed
+# docker is installed
 DOCKER_FOLDER="$HOME/.docker"
 if not_installed "docker"; then
 
@@ -32,7 +32,7 @@ fi
 printf "docker is installed\n"
 docker --version
 
-# 2. docker-compose if installed
+# docker-compose if installed
 if not_installed "docker-compose"; then
 
     printf "Installing docker-compose...\n"
@@ -45,14 +45,14 @@ printf "docker-compose is installed, upgrading\n"
 pip3 install --upgrade docker-compose
 docker-compose --version
 
-# 3. docker group exists
+# docker group exists
 readonly docker_group='docker'
 if ! grep -q "$docker_group" /etc/group; then
     sudo groupadd "$docker_group"
 fi
 printf "group '$docker_group' is created\n"
 
-# 4. user is in docker group
+# user is in docker group
 if ! groups "$USER" | grep -q "\b$docker_group\b"; then
     sudo usermod -aG docker "$USER"
 fi
diff --git a/install/31-keybase.sh b/install/31-keybase.sh
index c14a88e..effb837 100755
--- a/install/31-keybase.sh
+++ b/install/31-keybase.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# 1.keybase is installed
+# keybase is installed
 if not_installed "keybase"; then
 
     printf "Installing keybase...\n"
diff --git a/install/32-firebase.sh b/install/32-firebase.sh
new file mode 100755
index 0000000..752a326
--- /dev/null
+++ b/install/32-firebase.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+if not_installed "firebase"; then
+    echo "Installing firebase..."
+    run "https://firebase.tools" "bash"
+fi
+
+echo "firebase is installed, upgrading..."
+curl -sL firebase.tools | upgrade=true bash
+firebase --version
diff --git a/install/99-apt-clean.sh b/install/98-apt-clean.sh
similarity index 62%
rename from install/99-apt-clean.sh
rename to install/98-apt-clean.sh
index 2a5db67..07c4dcd 100755
--- a/install/99-apt-clean.sh
+++ b/install/98-apt-clean.sh
@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
 
-# post clean
+echo "cleaning"
 clean
diff --git a/install/99-screenfetch.sh b/install/99-screenfetch.sh
new file mode 100755
index 0000000..32f9325
--- /dev/null
+++ b/install/99-screenfetch.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+if not_installed "screenfetch"; then
+    echo "Installing screenfetch..."
+    install screenfetch
+fi
+
+echo "screenfetch is installed"
+screenfetch --version
+screenfetch
diff --git a/install/999-screenfetch.sh b/install/999-screenfetch.sh
deleted file mode 100755
index 7563217..0000000
--- a/install/999-screenfetch.sh
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/usr/bin/env bash
-screenfetch