https://github.com/mozilla/addons/issues/708
https://github.com/mozilla/addons-frontend/issues/4610

diff --git toolkit/mozapps/extensions/internal/AddonRepository.sys.mjs toolkit/mozapps/extensions/internal/AddonRepository.sys.mjs
index 8d4d178924..500eaef103 100644
--- toolkit/mozapps/extensions/internal/AddonRepository.sys.mjs
+++ toolkit/mozapps/extensions/internal/AddonRepository.sys.mjs
@@ -715,7 +715,7 @@ export var AddonRepository = {
       addon.version = String(aEntry.current_version.version);
       if (Array.isArray(aEntry.current_version.files)) {
         for (let file of aEntry.current_version.files) {
-          if (file.platform == "all" || file.platform == lazy.PLATFORM) {
+          if (file.platform == "all" || file.platform == "linux" || file.platform == lazy.PLATFORM) {
             if (file.url) {
               addon.sourceURI = lazy.NetUtil.newURI(file.url);
             }
diff --git toolkit/mozapps/extensions/internal/XPIDatabase.sys.mjs toolkit/mozapps/extensions/internal/XPIDatabase.sys.mjs
index 0b81770b94..19669951dc 100644
--- toolkit/mozapps/extensions/internal/XPIDatabase.sys.mjs
+++ toolkit/mozapps/extensions/internal/XPIDatabase.sys.mjs
@@ -635,7 +635,7 @@ export class AddonInternal {
     // Something is causing errors in here
     try {
       for (let platform of this.targetPlatforms) {
-        if (platform.os == Services.appinfo.OS) {
+        if (platform.os == "Linux" || platform.os == Services.appinfo.OS) {
           if (platform.abi) {
             needsABI = true;
             if (platform.abi === abi) {