diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0ad5cdf53..7063f3113 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -101,29 +101,31 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          keys:
+            - dependency-cache-{{ checksum "package-lock.json" }}
+            # fallback to using the latest cache if no exact match is found
+            - dependency-cache-
       - run:
-          name: Install deps via npm
-          command: npm install
+          name: Install npm 6 + deps via npm
+          command: |
+           sudo npm install -g npm@6.1.0 && npm install
       - save_cache:
           key: dependency-cache-{{ checksum "package-lock.json" }}
           paths:
             - node_modules
-      - save_cache:
-          key: dependency-cache-{{ .Revision }}
-          paths:
-            - node_modules
 
   prep-deps-firefox:
     docker:
       - image: circleci/node:8.11.3-browsers
     steps:
       - checkout
+      - restore_cache:
+          key: dependency-cache-firefox-
       - run:
-          name: Download Firefox
+          name: Download Firefox If needed
           command: ./.circleci/scripts/firefox-download.sh
       - save_cache:
-          key: dependency-cache-firefox-{{ .Revision }}
+          key: dependency-cache-firefox-
           paths:
             - firefox
 
@@ -133,7 +135,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: build:dist
           command: npm run dist
@@ -152,7 +154,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: build:dist
           command: npm run doc
@@ -167,7 +169,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Get Scss Cache key
           # this allows us to checksum against a whole directory
@@ -186,7 +188,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Test
           command: npm run lint
@@ -197,7 +199,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Test
           command: npx nsp check
@@ -208,7 +210,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - run:
@@ -224,12 +226,12 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-firefox-{{ .Revision }}
+          key: dependency-cache-firefox-
       - run:
           name: Install firefox
           command: ./.circleci/scripts/firefox-install.sh
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - run:
@@ -245,7 +247,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - run:
@@ -261,12 +263,12 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-firefox-{{ .Revision }}
+          key: dependency-cache-firefox-
       - run:
           name: Install firefox
           command: ./.circleci/scripts/firefox-install.sh
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - run:
@@ -282,7 +284,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - run:
@@ -299,7 +301,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - restore_cache:
@@ -326,7 +328,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - restore_cache:
@@ -349,7 +351,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: test:coverage
           command: npm run test:coverage
@@ -362,12 +364,12 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-firefox-{{ .Revision }}
+          key: dependency-cache-firefox-
       - run:
           name: Install firefox
           command: ./.circleci/scripts/firefox-install.sh
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Get Scss Cache key
           # this allows us to checksum against a whole directory
@@ -386,7 +388,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Get Scss Cache key
           # this allows us to checksum against a whole directory
@@ -405,12 +407,12 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-firefox-{{ .Revision }}
+          key: dependency-cache-firefox-
       - run:
           name: Install firefox
           command: ./.circleci/scripts/firefox-install.sh
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Get Scss Cache key
           # this allows us to checksum against a whole directory
@@ -429,7 +431,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ .Revision }}
+          key: dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Get Scss Cache key
           # this allows us to checksum against a whole directory
diff --git a/.circleci/scripts/firefox-download.sh b/.circleci/scripts/firefox-download.sh
index c63e8c3df..64f0c74e3 100755
--- a/.circleci/scripts/firefox-download.sh
+++ b/.circleci/scripts/firefox-download.sh
@@ -1,6 +1,13 @@
 #!/usr/bin/env bash
-
-echo "Downloading firefox..."
-wget https://ftp.mozilla.org/pub/firefox/releases/58.0/linux-x86_64/en-US/firefox-58.0.tar.bz2 \
-&& tar xjf firefox-58.0.tar.bz2
-echo "firefox download complete"
+echo "Checking if firefox was already downloaded"
+if [ -d "firefox" ]
+then
+    echo "Firefox found. No need to download"
+else
+    FIREFOX_VERSION="61.0.1"
+    FIREFOX_BINARY="firefox-$FIREFOX_VERSION.tar.bz2"
+    echo "Downloading firefox..."
+    wget "https://ftp.mozilla.org/pub/firefox/releases/$FIREFOX_VERSION/linux-x86_64/en-US/$FIREFOX_BINARY" \
+    && tar xjf "$FIREFOX_BINARY"
+    echo "firefox download complete"
+fi
diff --git a/.circleci/scripts/firefox-install.sh b/.circleci/scripts/firefox-install.sh
index 589bcbbb5..1c60f4de9 100755
--- a/.circleci/scripts/firefox-install.sh
+++ b/.circleci/scripts/firefox-install.sh
@@ -2,7 +2,7 @@
 
 echo "Installing firefox..."
 sudo rm -r /opt/firefox
-sudo mv firefox /opt/firefox58
+sudo mv firefox /opt/firefox61
 sudo mv /usr/bin/firefox /usr/bin/firefox-old
-sudo ln -s /opt/firefox58/firefox /usr/bin/firefox
+sudo ln -s /opt/firefox61/firefox /usr/bin/firefox
 echo "Firefox installed."