diff --git a/src/app/workflow/workflow.component.css b/src/app/workflow/workflow.component.css
index 2e6cf08e36..bddbab6a19 100644
--- a/src/app/workflow/workflow.component.css
+++ b/src/app/workflow/workflow.component.css
@@ -34,3 +34,17 @@ pre {
 .button-wrap > .button:not(:last-child) {
   margin-bottom: 10px;
 }
+a.disabled {
+  color: gray;
+  cursor: not-allowed;
+}
+a.disabled > img {
+    filter: brightness(90%);
+}
+p.import-warning {
+  font-size: 11px;
+  font-style: italic;
+  text-align: left;
+  line-height: 1em;
+  margin-bottom: 4px;
+}
diff --git a/src/app/workflow/workflow.component.html b/src/app/workflow/workflow.component.html
index 6a8176216e..73cbba1e44 100644
--- a/src/app/workflow/workflow.component.html
+++ b/src/app/workflow/workflow.component.html
@@ -210,7 +210,7 @@ <h3>Source Repositories</h3>
         </div>
       </div>
     </div>
-    <div class="panel panel-default" *ngIf="workflow && (dnastackURL || fireCloudURL)">
+    <div class="panel panel-default" *ngIf="isWdl(workflow)">
       <div class="panel-heading">
         <h3>Launch with</h3>
       </div>
@@ -218,11 +218,12 @@ <h3>Launch with</h3>
         <div class="container-source-repos">
           <div class="container-launch-with">
             <div class="button-wrap">
+              <p *ngIf="dnastackURL && (wdlHasFileImports || wdlHasHttpImports)" class="import-warning" >Warning: this version of the WDL has imports, which are not supported by DNAstack. Make sure to select a version without imports in DNAstack.</p>
               <div *ngIf="dnastackURL" class="button">
                 <p><a href="{{dnastackURL}}"><img src="../../assets/images/thirdparty/dnastack.png"> DNAstack &raquo;</a></p>
               </div>
-              <div *ngIf="fireCloudURL" class="button">
-                <p><a href="{{fireCloudURL}}"><img src="../../assets/images/thirdparty/FireCloud-white-icon.svg"> FireCloud &raquo;</a></p>
+              <div *ngIf="enableLaunchWithFireCloud" class="button" [title]="wdlHasFileImports ? 'FireCloud does not support file-path imports in WDL. It only supports http(s) imports.' : ''">
+                <p><a [class.disabled]="wdlHasFileImports" (click)="gotoFirecloud()"><img src="../../assets/images/thirdparty/FireCloud-white-icon.svg"> FireCloud &raquo;</a></p>
               </div>
             </div>
           </div>
diff --git a/src/app/workflow/workflow.component.ts b/src/app/workflow/workflow.component.ts
index a7bb653e6b..4c5b2371da 100644
--- a/src/app/workflow/workflow.component.ts
+++ b/src/app/workflow/workflow.component.ts
@@ -38,6 +38,8 @@ import { Workflow } from './../shared/swagger/model/workflow';
 import { UrlResolverService } from './../shared/url-resolver.service';
 import { SourceFile } from '../shared/swagger/model/sourceFile';
 
+const importHttpRegEx: RegExp = new RegExp(/^\s*import\s+"https?/, 'm');
+
 @Component({
   selector: 'app-workflow',
   templateUrl: './workflow.component.html',
@@ -47,6 +49,9 @@ export class WorkflowComponent extends Entry {
   workflowEditData: any;
   dnastackURL: string;
   fireCloudURL: string;
+  public wdlHasHttpImports: boolean;
+  public wdlHasFileImports: boolean;
+  public enableLaunchWithFireCloud = Dockstore.FEATURES.enableLaunchWithFireCloud;
   public workflow;
   public missingWarning: boolean;
   public title: string;
@@ -110,18 +115,45 @@ export class WorkflowComponent extends Entry {
     }
   }
 
-  private isWdl(workflowRef: ExtendedWorkflow) {
-    return workflowRef.full_workflow_path && workflowRef.descriptorType === 'wdl';
+  public isWdl(workflowRef: ExtendedWorkflow) {
+    return workflowRef && workflowRef.full_workflow_path && workflowRef.descriptorType === 'wdl';
+  }
+
+  public gotoFirecloud() {
+    if (this.fireCloudURL) {
+      window.open(this.fireCloudURL);
+    }
   }
 
-  private setupFireCloudUrl(workflowRef: ExtendedWorkflow) {
-    if (Dockstore.FEATURES.enableLaunchWithFireCloud) {
-      this.fireCloudURL = null;
+  /**
+   * Checks WDL for import statements, setting wdlHasFileImports and wdlHasHttpImports properties
+   * accordingly. If the WDL has file imports, doesn't bother to check if there are http imports, to save
+   * an Ajax call.
+   *
+   * Also sets the fireCloudURL property if the WDL has no file imports.
+   *
+   * This can be done more cleanly, but since code has been moved and substantially changed in develop branch,
+   * leaving like this for hot fix.
+   *
+   * @param {ExtendedWorkflow} workflowRef
+   */
+  private checkWdlForImportsAndSetFirecloudUrl(workflowRef: ExtendedWorkflow) {
+    this.fireCloudURL = null;
+    this.wdlHasFileImports = false;
+    this.wdlHasHttpImports = false;
+    if (this.isWdl(workflowRef)) {
       const version: WorkflowVersion = this.selectedVersion;
-      if (version && this.isWdl(workflowRef)) {
+      if (version) {
         this.workflowsService.secondaryWdl(workflowRef.id, version.name).subscribe((sourceFiles: Array<SourceFile>) => {
           if (!sourceFiles || sourceFiles.length === 0) {
-            this.fireCloudURL =  `${Dockstore.FIRECLOUD_IMPORT_URL}/${workflowRef.full_workflow_path}:${version.name}`;
+            this.workflowsService.wdl(workflowRef.id, version.name).subscribe((sourceFile) => {
+              this.wdlHasHttpImports = importHttpRegEx.test(sourceFile.content);
+            });
+            if (this.enableLaunchWithFireCloud) {
+              this.fireCloudURL = `${Dockstore.FIRECLOUD_IMPORT_URL}/${workflowRef.full_workflow_path}:${version.name}`;
+            }
+          } else {
+            this.wdlHasFileImports = true;
           }
         });
       }
@@ -142,7 +174,7 @@ export class WorkflowComponent extends Entry {
       this.title = this.workflow.full_workflow_path;
       this.initTool();
       this.sortedVersions = this.getSortedVersions(this.workflow.workflowVersions, this.defaultVersion);
-      this.setupFireCloudUrl(this.workflow);
+      this.checkWdlForImportsAndSetFirecloudUrl(this.workflow);
     }
   }
 
@@ -297,7 +329,7 @@ export class WorkflowComponent extends Entry {
     if (this.workflow != null) {
       this.updateUrl(this.workflow.full_workflow_path, 'my-workflows', 'workflows');
     }
-    this.setupFireCloudUrl(this.workflow);
+    this.checkWdlForImportsAndSetFirecloudUrl(this.workflow);
   }
 
   setEntryTab(tabName: string): void {