The Chrome extension requires a separate Google Apps Script to import contacts into your sheet. Follow these steps:

1. Open your Google Sheet (the same one used for the CRM)
2. Go to Extensions → Apps Script
3. If you already have the CRM script, create a new script file by clicking + next to "Files"
4. Name it ExtensionImport and paste this code:

   function doPost(e) {
     try {
       var sheet = SpreadsheetRight getActiveSpreadsheet().getActiveSheet();
       var data = JSON.parse(e.postData.contents);
       
       var mappings = data.columnMappings || {};
       var contacts = Array.isArray(data.contacts) ? data.contacts : [data];
       
       // Find the last row with data in column A (company column)
       var primaryColumn = mappings.company || 'A';
       var colNum = columnToNumber(primaryColumn);
       var lastRowInColumn = getLastRowInColumn(sheet, colNum);
       
       contacts.forEach(function(contact, index) {
         var lastRow = lastRowInColumn + 1 + index;
         
         // Map each field to its configured column
         setCell(sheet, lastRow, mappings.company, contact.company);
         setCell(sheet, lastRow, mappings.businessType, contact.businessType);
         setCell(sheet, lastRow, mappings.title, contact.title);
         setCell(sheet, lastRow, mappings.firstName, contact.firstName);
         setCell(sheet, lastRow, mappings.lastName, contact.lastName);
         setCell(sheet, lastRow, mappings.website, contact.website);
         setCell(sheet, lastRow, mappings.email, contact.email);
         setCell(sheet, lastRow, mappings.phone, contact.phone);
         setCell(sheet, lastRow, mappings.phone2, contact.phone2);
         setCell(sheet, lastRow, mappings.phone3, contact.phone3);
         setCell(sheet, lastRow, mappings.street, contact.street);
         setCell(sheet, lastRow, mappings.city, contact.city);
         setCell(sheet, lastRow, mappings.state, contact.state);
         setCell(sheet, lastRow, mappings.zip, contact.zip);
         setCell(sheet, lastRow, mappings.notes, contact.notes);
         setCell(sheet, lastRow, mappings.status, contact.status);
         setCell(sheet, lastRow, mappings.statusReason, contact.statusReason);
         setCell(sheet, lastRow, mappings.territory, contact.territory);
         setCell(sheet, lastRow, mappings.sequence, contact.sequence);
         setCell(sheet, lastRow, mappings.currentStep, contact.currentStep);
         setCell(sheet, lastRow, mappings.dueDate, contact.dueDate);
         setCell(sheet, lastRow, mappings.amount, contact.amount);
         setCell(sheet, lastRow, mappings.textingAvailable, contact.textingAvailable);
         setCell(sheet, lastRow, mappings.tag, contact.tag);
         setCell(sheet, lastRow, mappings.leadSource, contact.leadSource);
         setCell(sheet, lastRow, mappings.leadOwner, contact.leadOwner);
         setCell(sheet, lastRow, mappings.createdDate, contact.createdDate);
         setCell(sheet, lastRow, mappings.quoteAmount, contact.quoteAmount);
       });
       
       return ContentService
         .createTextOutput(JSON.stringify({ success: true, message: contacts.length + ' contact(s) added' }))
         .setMimeType(ContentService.MimeType.JSON);
         
     } catch (error) {
       return ContentService
         .createTextOutput(JSON.stringify({ success: false, error: error.toString() }))
         .setMimeType(ContentService.MimeType.JSON);
     }
   }
   
   function setCell(sheet, row, column, value) {
     if (column && value) {
       sheet.getRange(row, columnToNumber(column)).setValue(value);
     }
   }
   
   function columnToNumber(column) {
     var col = column.toUpperCase();
     var result = 0;
     for (var i = 0; i < col.length; i++) {
       result = result * 26 + col.charCodeAt(i) - 64;
     }
     return result;
   }
   
   function getLastRowInColumn(sheet, colNum) {
     var data = sheet.getRange(1, colNum, sheet.getMaxRows(), 1).getValues();
     for (var i = data.length - 1; i >= 0; i--) {
       if (data[i][0] !== '' && data[i][0] !== null) {
         return i + 1;
       }
     }
     return 0;
   }
   
   function doGet(e) {
     return ContentService
       .createTextOutput(JSON.stringify({ status: 'ready', message: 'CrawlSpace Sheets Integration Active' }))
       .setMimeType(ContentService.MimeType.JSON);
   }

5. Click Save (💾 icon)
6. Click Deploy → New Deployment
7. Choose type: Web app
8. Set "Execute as: Me" and "Who has access: Anyone"
9. Click Deploy
10. Copy the Web App URL and paste it in the extension settings